diff --git a/.strict-typing b/.strict-typing
index f663ec6a6b9..3eae62f4b4a 100644
--- a/.strict-typing
+++ b/.strict-typing
@@ -151,6 +151,7 @@ homeassistant.components.water_heater.*
 homeassistant.components.watttime.*
 homeassistant.components.weather.*
 homeassistant.components.websocket_api.*
+homeassistant.components.wemo.*
 homeassistant.components.zodiac.*
 homeassistant.components.zeroconf.*
 homeassistant.components.zone.*
diff --git a/homeassistant/components/wemo/__init__.py b/homeassistant/components/wemo/__init__.py
index 27d3a0cbf25..24cf7d66a0a 100644
--- a/homeassistant/components/wemo/__init__.py
+++ b/homeassistant/components/wemo/__init__.py
@@ -1,7 +1,9 @@
 """Support for WeMo device discovery."""
 from __future__ import annotations
 
+from collections.abc import Sequence
 import logging
+from typing import Any, Optional, Tuple
 
 import pywemo
 import voluptuous as vol
@@ -14,10 +16,11 @@ from homeassistant.components.sensor import DOMAIN as SENSOR_DOMAIN
 from homeassistant.components.switch import DOMAIN as SWITCH_DOMAIN
 from homeassistant.config_entries import ConfigEntry
 from homeassistant.const import CONF_DISCOVERY, EVENT_HOMEASSISTANT_STOP
-from homeassistant.core import HomeAssistant, callback
+from homeassistant.core import CALLBACK_TYPE, Event, HomeAssistant, callback
 from homeassistant.helpers import config_validation as cv
 from homeassistant.helpers.dispatcher import async_dispatcher_send
 from homeassistant.helpers.event import async_call_later
+from homeassistant.helpers.typing import ConfigType
 from homeassistant.util.async_ import gather_with_concurrency
 
 from .const import DOMAIN
@@ -44,21 +47,20 @@ WEMO_MODEL_DISPATCH = {
 
 _LOGGER = logging.getLogger(__name__)
 
+HostPortTuple = Tuple[str, Optional[int]]
 
-def coerce_host_port(value):
+
+def coerce_host_port(value: str) -> HostPortTuple:
     """Validate that provided value is either just host or host:port.
 
     Returns (host, None) or (host, port) respectively.
     """
-    host, _, port = value.partition(":")
+    host, _, port_str = value.partition(":")
 
     if not host:
         raise vol.Invalid("host cannot be empty")
 
-    if port:
-        port = cv.port(port)
-    else:
-        port = None
+    port = cv.port(port_str) if port_str else None
 
     return host, port
 
@@ -82,7 +84,7 @@ CONFIG_SCHEMA = vol.Schema(
 )
 
 
-async def async_setup(hass, config):
+async def async_setup(hass: HomeAssistant, config: ConfigType) -> bool:
     """Set up for WeMo devices."""
     hass.data[DOMAIN] = {
         "config": config.get(DOMAIN, {}),
@@ -112,11 +114,11 @@ async def async_setup_entry(hass: HomeAssistant, entry: ConfigEntry) -> bool:
     discovery_responder = pywemo.ssdp.DiscoveryResponder(registry.port)
     await hass.async_add_executor_job(discovery_responder.start)
 
-    static_conf = config.get(CONF_STATIC, [])
+    static_conf: Sequence[HostPortTuple] = config.get(CONF_STATIC, [])
     wemo_dispatcher = WemoDispatcher(entry)
     wemo_discovery = WemoDiscovery(hass, wemo_dispatcher, static_conf)
 
-    async def async_stop_wemo(event):
+    async def async_stop_wemo(event: Event) -> None:
         """Shutdown Wemo subscriptions and subscription thread on exit."""
         _LOGGER.debug("Shutting down WeMo event subscriptions")
         await hass.async_add_executor_job(registry.stop)
@@ -142,8 +144,8 @@ class WemoDispatcher:
     def __init__(self, config_entry: ConfigEntry) -> None:
         """Initialize the WemoDispatcher."""
         self._config_entry = config_entry
-        self._added_serial_numbers = set()
-        self._loaded_components = set()
+        self._added_serial_numbers: set[str] = set()
+        self._loaded_components: set[str] = set()
 
     async def async_add_unique_device(
         self, hass: HomeAssistant, wemo: pywemo.WeMoDevice
@@ -191,16 +193,16 @@ class WemoDiscovery:
         self,
         hass: HomeAssistant,
         wemo_dispatcher: WemoDispatcher,
-        static_config: list[tuple[[str, str | None]]],
+        static_config: Sequence[HostPortTuple],
     ) -> None:
         """Initialize the WemoDiscovery."""
         self._hass = hass
         self._wemo_dispatcher = wemo_dispatcher
-        self._stop = None
+        self._stop: CALLBACK_TYPE | None = None
         self._scan_delay = 0
         self._static_config = static_config
 
-    async def async_discover_and_schedule(self, *_) -> None:
+    async def async_discover_and_schedule(self, *_: tuple[Any]) -> None:
         """Periodically scan the network looking for WeMo devices."""
         _LOGGER.debug("Scanning network for WeMo devices")
         try:
@@ -229,26 +231,23 @@ class WemoDiscovery:
             self._stop()
             self._stop = None
 
-    async def discover_statics(self):
+    async def discover_statics(self) -> None:
         """Initialize or Re-Initialize connections to statically configured devices."""
-        if self._static_config:
-            _LOGGER.debug("Adding statically configured WeMo devices")
-            for device in await gather_with_concurrency(
-                MAX_CONCURRENCY,
-                *(
-                    self._hass.async_add_executor_job(
-                        validate_static_config, host, port
-                    )
-                    for host, port in self._static_config
-                ),
-            ):
-                if device:
-                    await self._wemo_dispatcher.async_add_unique_device(
-                        self._hass, device
-                    )
+        if not self._static_config:
+            return
+        _LOGGER.debug("Adding statically configured WeMo devices")
+        for device in await gather_with_concurrency(
+            MAX_CONCURRENCY,
+            *(
+                self._hass.async_add_executor_job(validate_static_config, host, port)
+                for host, port in self._static_config
+            ),
+        ):
+            if device:
+                await self._wemo_dispatcher.async_add_unique_device(self._hass, device)
 
 
-def validate_static_config(host, port):
+def validate_static_config(host: str, port: int | None) -> pywemo.WeMoDevice | None:
     """Handle a static config."""
     url = pywemo.setup_url_for_address(host, port)
 
diff --git a/homeassistant/components/wemo/binary_sensor.py b/homeassistant/components/wemo/binary_sensor.py
index 1341d5526a3..766ca61c560 100644
--- a/homeassistant/components/wemo/binary_sensor.py
+++ b/homeassistant/components/wemo/binary_sensor.py
@@ -4,16 +4,24 @@ import asyncio
 from pywemo import Insight, Maker
 
 from homeassistant.components.binary_sensor import BinarySensorEntity
+from homeassistant.config_entries import ConfigEntry
+from homeassistant.core import HomeAssistant
 from homeassistant.helpers.dispatcher import async_dispatcher_connect
+from homeassistant.helpers.entity_platform import AddEntitiesCallback
 
 from .const import DOMAIN as WEMO_DOMAIN
 from .entity import WemoEntity
+from .wemo_device import DeviceCoordinator
 
 
-async def async_setup_entry(hass, config_entry, async_add_entities):
+async def async_setup_entry(
+    hass: HomeAssistant,
+    config_entry: ConfigEntry,
+    async_add_entities: AddEntitiesCallback,
+) -> None:
     """Set up WeMo binary sensors."""
 
-    async def _discovered_wemo(coordinator):
+    async def _discovered_wemo(coordinator: DeviceCoordinator) -> None:
         """Handle a discovered Wemo device."""
         if isinstance(coordinator.wemo, Insight):
             async_add_entities([InsightBinarySensor(coordinator)])
@@ -38,7 +46,7 @@ class WemoBinarySensor(WemoEntity, BinarySensorEntity):
     @property
     def is_on(self) -> bool:
         """Return true if the state is on. Standby is on."""
-        return self.wemo.get_state()
+        return bool(self.wemo.get_state())
 
 
 class MakerBinarySensor(WemoEntity, BinarySensorEntity):
@@ -49,7 +57,7 @@ class MakerBinarySensor(WemoEntity, BinarySensorEntity):
     @property
     def is_on(self) -> bool:
         """Return true if the Maker's sensor is pulled low."""
-        return self.wemo.has_sensor and self.wemo.sensor_state == 0
+        return bool(self.wemo.has_sensor) and self.wemo.sensor_state == 0
 
 
 class InsightBinarySensor(WemoBinarySensor):
diff --git a/homeassistant/components/wemo/config_flow.py b/homeassistant/components/wemo/config_flow.py
index b778779ea3c..6783d870cdc 100644
--- a/homeassistant/components/wemo/config_flow.py
+++ b/homeassistant/components/wemo/config_flow.py
@@ -2,12 +2,13 @@
 
 import pywemo
 
+from homeassistant.core import HomeAssistant
 from homeassistant.helpers import config_entry_flow
 
 from . import DOMAIN
 
 
-async def _async_has_devices(hass):
+async def _async_has_devices(hass: HomeAssistant) -> bool:
     """Return if there are devices that can be discovered."""
     return bool(await hass.async_add_executor_job(pywemo.discover_devices))
 
diff --git a/homeassistant/components/wemo/device_trigger.py b/homeassistant/components/wemo/device_trigger.py
index da9a157e1a4..1cdc29fa995 100644
--- a/homeassistant/components/wemo/device_trigger.py
+++ b/homeassistant/components/wemo/device_trigger.py
@@ -1,10 +1,20 @@
 """Triggers for WeMo devices."""
+from __future__ import annotations
+
+from typing import Any
+
 from pywemo.subscribe import EVENT_TYPE_LONG_PRESS
 import voluptuous as vol
 
+from homeassistant.components.automation import (
+    AutomationActionType,
+    AutomationTriggerInfo,
+)
 from homeassistant.components.device_automation import DEVICE_TRIGGER_BASE_SCHEMA
 from homeassistant.components.homeassistant.triggers import event as event_trigger
 from homeassistant.const import CONF_DEVICE_ID, CONF_DOMAIN, CONF_PLATFORM, CONF_TYPE
+from homeassistant.core import CALLBACK_TYPE, HomeAssistant
+from homeassistant.helpers.typing import ConfigType
 
 from .const import DOMAIN as WEMO_DOMAIN, WEMO_SUBSCRIPTION_EVENT
 from .wemo_device import async_get_coordinator
@@ -18,7 +28,9 @@ TRIGGER_SCHEMA = DEVICE_TRIGGER_BASE_SCHEMA.extend(
 )
 
 
-async def async_get_triggers(hass, device_id):
+async def async_get_triggers(
+    hass: HomeAssistant, device_id: str
+) -> list[dict[str, Any]]:
     """Return a list of triggers."""
 
     wemo_trigger = {
@@ -44,7 +56,12 @@ async def async_get_triggers(hass, device_id):
     return triggers
 
 
-async def async_attach_trigger(hass, config, action, automation_info):
+async def async_attach_trigger(
+    hass: HomeAssistant,
+    config: ConfigType,
+    action: AutomationActionType,
+    automation_info: AutomationTriggerInfo,
+) -> CALLBACK_TYPE:
     """Attach a trigger."""
     event_config = event_trigger.TRIGGER_SCHEMA(
         {
diff --git a/homeassistant/components/wemo/entity.py b/homeassistant/components/wemo/entity.py
index 2811d371f6b..824fcacae7c 100644
--- a/homeassistant/components/wemo/entity.py
+++ b/homeassistant/components/wemo/entity.py
@@ -33,7 +33,7 @@ class WemoEntity(CoordinatorEntity):
         self._available = True
 
     @property
-    def name_suffix(self):
+    def name_suffix(self) -> str | None:
         """Suffix to append to the WeMo device name."""
         return self._name_suffix
 
@@ -42,7 +42,7 @@ class WemoEntity(CoordinatorEntity):
         """Return the name of the device if any."""
         if suffix := self.name_suffix:
             return f"{self.wemo.name} {suffix}"
-        return self.wemo.name
+        return str(self.wemo.name)
 
     @property
     def available(self) -> bool:
@@ -50,10 +50,10 @@ class WemoEntity(CoordinatorEntity):
         return super().available and self._available
 
     @property
-    def unique_id_suffix(self):
+    def unique_id_suffix(self) -> str | None:
         """Suffix to append to the WeMo device's unique ID."""
         if self._unique_id_suffix is None and self.name_suffix is not None:
-            return self._name_suffix.lower()
+            return self.name_suffix.lower()
         return self._unique_id_suffix
 
     @property
@@ -61,7 +61,7 @@ class WemoEntity(CoordinatorEntity):
         """Return the id of this WeMo device."""
         if suffix := self.unique_id_suffix:
             return f"{self.wemo.serialnumber}_{suffix}"
-        return self.wemo.serialnumber
+        return str(self.wemo.serialnumber)
 
     @property
     def device_info(self) -> DeviceInfo:
diff --git a/homeassistant/components/wemo/fan.py b/homeassistant/components/wemo/fan.py
index 00f9b77aa61..003dfa7e633 100644
--- a/homeassistant/components/wemo/fan.py
+++ b/homeassistant/components/wemo/fan.py
@@ -1,14 +1,19 @@
 """Support for WeMo humidifier."""
+from __future__ import annotations
+
 import asyncio
 from datetime import timedelta
 import math
+from typing import Any
 
 import voluptuous as vol
 
 from homeassistant.components.fan import SUPPORT_SET_SPEED, FanEntity
-from homeassistant.core import callback
+from homeassistant.config_entries import ConfigEntry
+from homeassistant.core import HomeAssistant, callback
 from homeassistant.helpers import entity_platform
 from homeassistant.helpers.dispatcher import async_dispatcher_connect
+from homeassistant.helpers.entity_platform import AddEntitiesCallback
 from homeassistant.util.percentage import (
     int_states_in_range,
     percentage_to_ranged_value,
@@ -21,6 +26,7 @@ from .const import (
     SERVICE_SET_HUMIDITY,
 )
 from .entity import WemoEntity
+from .wemo_device import DeviceCoordinator
 
 SCAN_INTERVAL = timedelta(seconds=10)
 PARALLEL_UPDATES = 0
@@ -63,10 +69,14 @@ SET_HUMIDITY_SCHEMA = {
 }
 
 
-async def async_setup_entry(hass, config_entry, async_add_entities):
+async def async_setup_entry(
+    hass: HomeAssistant,
+    config_entry: ConfigEntry,
+    async_add_entities: AddEntitiesCallback,
+) -> None:
     """Set up WeMo binary sensors."""
 
-    async def _discovered_wemo(coordinator):
+    async def _discovered_wemo(coordinator: DeviceCoordinator) -> None:
         """Handle a discovered Wemo device."""
         async_add_entities([WemoHumidifier(coordinator)])
 
@@ -95,7 +105,7 @@ async def async_setup_entry(hass, config_entry, async_add_entities):
 class WemoHumidifier(WemoEntity, FanEntity):
     """Representation of a WeMo humidifier."""
 
-    def __init__(self, coordinator):
+    def __init__(self, coordinator: DeviceCoordinator) -> None:
         """Initialize the WeMo switch."""
         super().__init__(coordinator)
         if self.wemo.fan_mode != WEMO_FAN_OFF:
@@ -104,12 +114,12 @@ class WemoHumidifier(WemoEntity, FanEntity):
             self._last_fan_on_mode = WEMO_FAN_MEDIUM
 
     @property
-    def icon(self):
+    def icon(self) -> str:
         """Return the icon of device based on its type."""
         return "mdi:water-percent"
 
     @property
-    def extra_state_attributes(self):
+    def extra_state_attributes(self) -> dict[str, Any]:
         """Return device specific state attributes."""
         return {
             ATTR_CURRENT_HUMIDITY: self.wemo.current_humidity_percent,
@@ -145,26 +155,26 @@ class WemoHumidifier(WemoEntity, FanEntity):
     @property
     def is_on(self) -> bool:
         """Return true if the state is on."""
-        return self.wemo.get_state()
+        return bool(self.wemo.get_state())
 
     def turn_on(
         self,
-        speed: str = None,
-        percentage: int = None,
-        preset_mode: str = None,
-        **kwargs,
+        speed: str | None = None,
+        percentage: int | None = None,
+        preset_mode: str | None = None,
+        **kwargs: Any,
     ) -> None:
         """Turn the fan on."""
         self.set_percentage(percentage)
 
-    def turn_off(self, **kwargs) -> None:
+    def turn_off(self, **kwargs: Any) -> None:
         """Turn the switch off."""
         with self._wemo_exception_handler("turn off"):
             self.wemo.set_state(WEMO_FAN_OFF)
 
         self.schedule_update_ha_state()
 
-    def set_percentage(self, percentage: int) -> None:
+    def set_percentage(self, percentage: int | None) -> None:
         """Set the fan_mode of the Humidifier."""
         if percentage is None:
             named_speed = self._last_fan_on_mode
diff --git a/homeassistant/components/wemo/light.py b/homeassistant/components/wemo/light.py
index c46a4e78440..eb19355f2b3 100644
--- a/homeassistant/components/wemo/light.py
+++ b/homeassistant/components/wemo/light.py
@@ -1,5 +1,8 @@
 """Support for Belkin WeMo lights."""
+from __future__ import annotations
+
 import asyncio
+from typing import Any
 
 from pywemo.ouimeaux_device import bridge
 
@@ -14,10 +17,12 @@ from homeassistant.components.light import (
     SUPPORT_TRANSITION,
     LightEntity,
 )
-from homeassistant.core import callback
+from homeassistant.config_entries import ConfigEntry
+from homeassistant.core import HomeAssistant, callback
 from homeassistant.helpers.device_registry import CONNECTION_ZIGBEE
 from homeassistant.helpers.dispatcher import async_dispatcher_connect
 from homeassistant.helpers.entity import DeviceInfo
+from homeassistant.helpers.entity_platform import AddEntitiesCallback
 import homeassistant.util.color as color_util
 
 from .const import DOMAIN as WEMO_DOMAIN
@@ -32,10 +37,14 @@ SUPPORT_WEMO = (
 WEMO_OFF = 0
 
 
-async def async_setup_entry(hass, config_entry, async_add_entities):
+async def async_setup_entry(
+    hass: HomeAssistant,
+    config_entry: ConfigEntry,
+    async_add_entities: AddEntitiesCallback,
+) -> None:
     """Set up WeMo lights."""
 
-    async def _discovered_wemo(coordinator: DeviceCoordinator):
+    async def _discovered_wemo(coordinator: DeviceCoordinator) -> None:
         """Handle a discovered Wemo device."""
         if isinstance(coordinator.wemo, bridge.Bridge):
             async_setup_bridge(hass, config_entry, async_add_entities, coordinator)
@@ -53,12 +62,17 @@ async def async_setup_entry(hass, config_entry, async_add_entities):
 
 
 @callback
-def async_setup_bridge(hass, config_entry, async_add_entities, coordinator):
+def async_setup_bridge(
+    hass: HomeAssistant,
+    config_entry: ConfigEntry,
+    async_add_entities: AddEntitiesCallback,
+    coordinator: DeviceCoordinator,
+) -> None:
     """Set up a WeMo link."""
     known_light_ids = set()
 
     @callback
-    def async_update_lights():
+    def async_update_lights() -> None:
         """Check to see if the bridge has any new lights."""
         new_lights = []
 
@@ -87,7 +101,7 @@ class WemoLight(WemoEntity, LightEntity):
     @property
     def name(self) -> str:
         """Return the name of the device if any."""
-        return self.light.name
+        return str(self.light.name)
 
     @property
     def available(self) -> bool:
@@ -95,9 +109,9 @@ class WemoLight(WemoEntity, LightEntity):
         return super().available and self.light.state.get("available")
 
     @property
-    def unique_id(self):
+    def unique_id(self) -> str:
         """Return the ID of this light."""
-        return self.light.uniqueID
+        return str(self.light.uniqueID)
 
     @property
     def device_info(self) -> DeviceInfo:
@@ -111,33 +125,35 @@ class WemoLight(WemoEntity, LightEntity):
         )
 
     @property
-    def brightness(self):
+    def brightness(self) -> int:
         """Return the brightness of this light between 0..255."""
-        return self.light.state.get("level", 255)
+        return int(self.light.state.get("level", 255))
 
     @property
-    def hs_color(self):
+    def hs_color(self) -> tuple[float, float] | None:
         """Return the hs color values of this light."""
         if xy_color := self.light.state.get("color_xy"):
             return color_util.color_xy_to_hs(*xy_color)
         return None
 
     @property
-    def color_temp(self):
+    def color_temp(self) -> int | None:
         """Return the color temperature of this light in mireds."""
-        return self.light.state.get("temperature_mireds")
+        if (temp := self.light.state.get("temperature_mireds")) is not None:
+            return int(temp)
+        return None
 
     @property
-    def is_on(self):
+    def is_on(self) -> bool:
         """Return true if device is on."""
-        return self.light.state.get("onoff") != WEMO_OFF
+        return bool(self.light.state.get("onoff") != WEMO_OFF)
 
     @property
-    def supported_features(self):
+    def supported_features(self) -> int:
         """Flag supported features."""
         return SUPPORT_WEMO
 
-    def turn_on(self, **kwargs):
+    def turn_on(self, **kwargs: Any) -> None:
         """Turn the light on."""
         xy_color = None
 
@@ -168,7 +184,7 @@ class WemoLight(WemoEntity, LightEntity):
 
         self.schedule_update_ha_state()
 
-    def turn_off(self, **kwargs):
+    def turn_off(self, **kwargs: Any) -> None:
         """Turn the light off."""
         transition_time = int(kwargs.get(ATTR_TRANSITION, 0))
 
@@ -182,12 +198,12 @@ class WemoDimmer(WemoEntity, LightEntity):
     """Representation of a WeMo dimmer."""
 
     @property
-    def supported_features(self):
+    def supported_features(self) -> int:
         """Flag supported features."""
         return SUPPORT_BRIGHTNESS
 
     @property
-    def brightness(self):
+    def brightness(self) -> int:
         """Return the brightness of this light between 1 and 100."""
         wemo_brightness = int(self.wemo.get_brightness())
         return int((wemo_brightness * 255) / 100)
@@ -195,9 +211,9 @@ class WemoDimmer(WemoEntity, LightEntity):
     @property
     def is_on(self) -> bool:
         """Return true if the state is on."""
-        return self.wemo.get_state()
+        return bool(self.wemo.get_state())
 
-    def turn_on(self, **kwargs):
+    def turn_on(self, **kwargs: Any) -> None:
         """Turn the dimmer on."""
         # Wemo dimmer switches use a range of [0, 100] to control
         # brightness. Level 255 might mean to set it to previous value
@@ -212,7 +228,7 @@ class WemoDimmer(WemoEntity, LightEntity):
 
         self.schedule_update_ha_state()
 
-    def turn_off(self, **kwargs):
+    def turn_off(self, **kwargs: Any) -> None:
         """Turn the dimmer off."""
         with self._wemo_exception_handler("turn off"):
             self.wemo.off()
diff --git a/homeassistant/components/wemo/sensor.py b/homeassistant/components/wemo/sensor.py
index 49e6b187515..c46e8928a03 100644
--- a/homeassistant/components/wemo/sensor.py
+++ b/homeassistant/components/wemo/sensor.py
@@ -7,8 +7,11 @@ from homeassistant.components.sensor import (
     SensorEntityDescription,
     SensorStateClass,
 )
+from homeassistant.config_entries import ConfigEntry
 from homeassistant.const import ENERGY_KILO_WATT_HOUR, POWER_WATT
+from homeassistant.core import HomeAssistant
 from homeassistant.helpers.dispatcher import async_dispatcher_connect
+from homeassistant.helpers.entity_platform import AddEntitiesCallback
 from homeassistant.helpers.typing import StateType
 from homeassistant.util import convert
 
@@ -17,10 +20,14 @@ from .entity import WemoEntity
 from .wemo_device import DeviceCoordinator
 
 
-async def async_setup_entry(hass, config_entry, async_add_entities):
+async def async_setup_entry(
+    hass: HomeAssistant,
+    config_entry: ConfigEntry,
+    async_add_entities: AddEntitiesCallback,
+) -> None:
     """Set up WeMo sensors."""
 
-    async def _discovered_wemo(coordinator: DeviceCoordinator):
+    async def _discovered_wemo(coordinator: DeviceCoordinator) -> None:
         """Handle a discovered Wemo device."""
         async_add_entities(
             [InsightCurrentPower(coordinator), InsightTodayEnergy(coordinator)]
@@ -42,7 +49,7 @@ class InsightSensor(WemoEntity, SensorEntity):
     @property
     def name_suffix(self) -> str:
         """Return the name of the entity if any."""
-        return self.entity_description.name
+        return str(self.entity_description.name)
 
     @property
     def unique_id_suffix(self) -> str:
@@ -50,7 +57,7 @@ class InsightSensor(WemoEntity, SensorEntity):
         return self.entity_description.key
 
     @property
-    def available(self) -> str:
+    def available(self) -> bool:
         """Return true if sensor is available."""
         return (
             self.entity_description.key in self.wemo.insight_params
@@ -72,12 +79,11 @@ class InsightCurrentPower(InsightSensor):
     @property
     def native_value(self) -> StateType:
         """Return the current power consumption."""
-        return (
-            convert(
-                self.wemo.insight_params.get(self.entity_description.key), float, 0.0
-            )
-            / 1000.0
+        milliwatts = convert(
+            self.wemo.insight_params.get(self.entity_description.key), float, 0.0
         )
+        assert isinstance(milliwatts, float)
+        return milliwatts / 1000.0
 
 
 class InsightTodayEnergy(InsightSensor):
@@ -94,7 +100,8 @@ class InsightTodayEnergy(InsightSensor):
     @property
     def native_value(self) -> StateType:
         """Return the current energy use today."""
-        miliwatts = convert(
+        milliwatt_seconds = convert(
             self.wemo.insight_params.get(self.entity_description.key), float, 0.0
         )
-        return round(miliwatts / (1000.0 * 1000.0 * 60), 2)
+        assert isinstance(milliwatt_seconds, float)
+        return round(milliwatt_seconds / (1000.0 * 1000.0 * 60), 2)
diff --git a/homeassistant/components/wemo/switch.py b/homeassistant/components/wemo/switch.py
index d1240d034b5..39a6219b98b 100644
--- a/homeassistant/components/wemo/switch.py
+++ b/homeassistant/components/wemo/switch.py
@@ -1,16 +1,23 @@
 """Support for WeMo switches."""
+from __future__ import annotations
+
 import asyncio
 from datetime import datetime, timedelta
+from typing import Any
 
 from pywemo import CoffeeMaker, Insight, Maker
 
 from homeassistant.components.switch import SwitchEntity
+from homeassistant.config_entries import ConfigEntry
 from homeassistant.const import STATE_OFF, STATE_ON, STATE_STANDBY, STATE_UNKNOWN
+from homeassistant.core import HomeAssistant
 from homeassistant.helpers.dispatcher import async_dispatcher_connect
+from homeassistant.helpers.entity_platform import AddEntitiesCallback
 from homeassistant.util import convert
 
 from .const import DOMAIN as WEMO_DOMAIN
 from .entity import WemoEntity
+from .wemo_device import DeviceCoordinator
 
 SCAN_INTERVAL = timedelta(seconds=10)
 PARALLEL_UPDATES = 0
@@ -29,10 +36,14 @@ WEMO_OFF = 0
 WEMO_STANDBY = 8
 
 
-async def async_setup_entry(hass, config_entry, async_add_entities):
+async def async_setup_entry(
+    hass: HomeAssistant,
+    config_entry: ConfigEntry,
+    async_add_entities: AddEntitiesCallback,
+) -> None:
     """Set up WeMo switches."""
 
-    async def _discovered_wemo(coordinator):
+    async def _discovered_wemo(coordinator: DeviceCoordinator) -> None:
         """Handle a discovered Wemo device."""
         async_add_entities([WemoSwitch(coordinator)])
 
@@ -50,9 +61,9 @@ class WemoSwitch(WemoEntity, SwitchEntity):
     """Representation of a WeMo switch."""
 
     @property
-    def extra_state_attributes(self):
+    def extra_state_attributes(self) -> dict[str, Any]:
         """Return the state attributes of the device."""
-        attr = {}
+        attr: dict[str, Any] = {}
         if isinstance(self.wemo, Maker):
             # Is the maker sensor on or off.
             if self.wemo.maker_params["hassensor"]:
@@ -81,10 +92,11 @@ class WemoSwitch(WemoEntity, SwitchEntity):
             attr["on_total_time"] = WemoSwitch.as_uptime(
                 self.wemo.insight_params.get("ontotal", 0)
             )
-            attr["power_threshold_w"] = (
-                convert(self.wemo.insight_params.get("powerthreshold"), float, 0.0)
-                / 1000.0
+            threshold = convert(
+                self.wemo.insight_params.get("powerthreshold"), float, 0.0
             )
+            assert isinstance(threshold, float)
+            attr["power_threshold_w"] = threshold / 1000.0
 
         if isinstance(self.wemo, CoffeeMaker):
             attr[ATTR_COFFEMAKER_MODE] = self.wemo.mode
@@ -92,7 +104,7 @@ class WemoSwitch(WemoEntity, SwitchEntity):
         return attr
 
     @staticmethod
-    def as_uptime(_seconds):
+    def as_uptime(_seconds: int) -> str:
         """Format seconds into uptime string in the format: 00d 00h 00m 00s."""
         uptime = datetime(1, 1, 1) + timedelta(seconds=_seconds)
         return "{:0>2d}d {:0>2d}h {:0>2d}m {:0>2d}s".format(
@@ -100,26 +112,28 @@ class WemoSwitch(WemoEntity, SwitchEntity):
         )
 
     @property
-    def current_power_w(self):
+    def current_power_w(self) -> float | None:
         """Return the current power usage in W."""
-        if isinstance(self.wemo, Insight):
-            return (
-                convert(self.wemo.insight_params.get("currentpower"), float, 0.0)
-                / 1000.0
-            )
+        if not isinstance(self.wemo, Insight):
+            return None
+        milliwatts = convert(self.wemo.insight_params.get("currentpower"), float, 0.0)
+        assert isinstance(milliwatts, float)
+        return milliwatts / 1000.0
 
     @property
-    def today_energy_kwh(self):
+    def today_energy_kwh(self) -> float | None:
         """Return the today total energy usage in kWh."""
-        if isinstance(self.wemo, Insight):
-            miliwatts = convert(self.wemo.insight_params.get("todaymw"), float, 0.0)
-            return round(miliwatts / (1000.0 * 1000.0 * 60), 2)
+        if not isinstance(self.wemo, Insight):
+            return None
+        milliwatt_seconds = convert(self.wemo.insight_params.get("todaymw"), float, 0.0)
+        assert isinstance(milliwatt_seconds, float)
+        return round(milliwatt_seconds / (1000.0 * 1000.0 * 60), 2)
 
     @property
-    def detail_state(self):
+    def detail_state(self) -> str:
         """Return the state of the device."""
         if isinstance(self.wemo, CoffeeMaker):
-            return self.wemo.mode_string
+            return str(self.wemo.mode_string)
         if isinstance(self.wemo, Insight):
             standby_state = int(self.wemo.insight_params.get("state", 0))
             if standby_state == WEMO_ON:
@@ -129,9 +143,10 @@ class WemoSwitch(WemoEntity, SwitchEntity):
             if standby_state == WEMO_STANDBY:
                 return STATE_STANDBY
             return STATE_UNKNOWN
+        assert False  # Unreachable code statement.
 
     @property
-    def icon(self):
+    def icon(self) -> str | None:
         """Return the icon of device based on its type."""
         if isinstance(self.wemo, CoffeeMaker):
             return "mdi:coffee"
@@ -140,16 +155,16 @@ class WemoSwitch(WemoEntity, SwitchEntity):
     @property
     def is_on(self) -> bool:
         """Return true if the state is on. Standby is on."""
-        return self.wemo.get_state()
+        return bool(self.wemo.get_state())
 
-    def turn_on(self, **kwargs):
+    def turn_on(self, **kwargs: Any) -> None:
         """Turn the switch on."""
         with self._wemo_exception_handler("turn on"):
             self.wemo.on()
 
         self.schedule_update_ha_state()
 
-    def turn_off(self, **kwargs):
+    def turn_off(self, **kwargs: Any) -> None:
         """Turn the switch off."""
         with self._wemo_exception_handler("turn off"):
             self.wemo.off()
diff --git a/homeassistant/components/wemo/wemo_device.py b/homeassistant/components/wemo/wemo_device.py
index a507338a4cd..b7138cb0a94 100644
--- a/homeassistant/components/wemo/wemo_device.py
+++ b/homeassistant/components/wemo/wemo_device.py
@@ -165,4 +165,5 @@ async def async_register_device(
 @callback
 def async_get_coordinator(hass: HomeAssistant, device_id: str) -> DeviceCoordinator:
     """Return DeviceCoordinator for device_id."""
-    return hass.data[DOMAIN]["devices"][device_id]
+    coordinator: DeviceCoordinator = hass.data[DOMAIN]["devices"][device_id]
+    return coordinator
diff --git a/mypy.ini b/mypy.ini
index 475840c3b4d..b4c6c802d04 100644
--- a/mypy.ini
+++ b/mypy.ini
@@ -1672,6 +1672,17 @@ no_implicit_optional = true
 warn_return_any = true
 warn_unreachable = true
 
+[mypy-homeassistant.components.wemo.*]
+check_untyped_defs = true
+disallow_incomplete_defs = true
+disallow_subclassing_any = true
+disallow_untyped_calls = true
+disallow_untyped_decorators = true
+disallow_untyped_defs = true
+no_implicit_optional = true
+warn_return_any = true
+warn_unreachable = true
+
 [mypy-homeassistant.components.zodiac.*]
 check_untyped_defs = true
 disallow_incomplete_defs = true
@@ -2066,9 +2077,6 @@ ignore_errors = true
 [mypy-homeassistant.components.vizio.*]
 ignore_errors = true
 
-[mypy-homeassistant.components.wemo.*]
-ignore_errors = true
-
 [mypy-homeassistant.components.withings.*]
 ignore_errors = true
 
diff --git a/script/hassfest/mypy_config.py b/script/hassfest/mypy_config.py
index 6fc6c0e3993..220837fd10b 100644
--- a/script/hassfest/mypy_config.py
+++ b/script/hassfest/mypy_config.py
@@ -127,7 +127,6 @@ IGNORED_MODULES: Final[list[str]] = [
     "homeassistant.components.vera.*",
     "homeassistant.components.verisure.*",
     "homeassistant.components.vizio.*",
-    "homeassistant.components.wemo.*",
     "homeassistant.components.withings.*",
     "homeassistant.components.xbox.*",
     "homeassistant.components.xiaomi_aqara.*",
diff --git a/tests/components/wemo/test_light_bridge.py b/tests/components/wemo/test_light_bridge.py
index b00cfe30ef7..9f622a22c1d 100644
--- a/tests/components/wemo/test_light_bridge.py
+++ b/tests/components/wemo/test_light_bridge.py
@@ -8,7 +8,7 @@ from homeassistant.components.homeassistant import (
     DOMAIN as HA_DOMAIN,
     SERVICE_UPDATE_ENTITY,
 )
-from homeassistant.components.light import DOMAIN as LIGHT_DOMAIN
+from homeassistant.components.light import ATTR_COLOR_TEMP, DOMAIN as LIGHT_DOMAIN
 from homeassistant.const import ATTR_ENTITY_ID, STATE_OFF, STATE_ON
 from homeassistant.setup import async_setup_component
 
@@ -88,13 +88,16 @@ async def test_light_update_entity(
 
     # On state.
     pywemo_bridge_light.state["onoff"] = 1
+    pywemo_bridge_light.state["temperature_mireds"] = 432
     await hass.services.async_call(
         HA_DOMAIN,
         SERVICE_UPDATE_ENTITY,
         {ATTR_ENTITY_ID: [wemo_entity.entity_id]},
         blocking=True,
     )
-    assert hass.states.get(wemo_entity.entity_id).state == STATE_ON
+    state = hass.states.get(wemo_entity.entity_id)
+    assert state.attributes.get(ATTR_COLOR_TEMP) == 432
+    assert state.state == STATE_ON
 
     # Off state.
     pywemo_bridge_light.state["onoff"] = 0