diff --git a/.strict-typing b/.strict-typing
index 0a226f973f6..240be148a03 100644
--- a/.strict-typing
+++ b/.strict-typing
@@ -68,6 +68,7 @@ homeassistant.components.notify.*
 homeassistant.components.notion.*
 homeassistant.components.number.*
 homeassistant.components.onewire.*
+homeassistant.components.openuv.*
 homeassistant.components.persistent_notification.*
 homeassistant.components.pi_hole.*
 homeassistant.components.proximity.*
diff --git a/homeassistant/components/openuv/__init__.py b/homeassistant/components/openuv/__init__.py
index df63dd91b2e..0de97e52cbe 100644
--- a/homeassistant/components/openuv/__init__.py
+++ b/homeassistant/components/openuv/__init__.py
@@ -1,9 +1,14 @@
 """Support for UV data from openuv.io."""
+from __future__ import annotations
+
 import asyncio
+from collections.abc import MutableMapping
+from typing import Any
 
 from pyopenuv import Client
 from pyopenuv.errors import OpenUvError
 
+from homeassistant.config_entries import ConfigEntry
 from homeassistant.const import (
     ATTR_ATTRIBUTION,
     CONF_API_KEY,
@@ -13,7 +18,7 @@ from homeassistant.const import (
     CONF_LONGITUDE,
     CONF_SENSORS,
 )
-from homeassistant.core import callback
+from homeassistant.core import HomeAssistant, ServiceCall, callback
 from homeassistant.exceptions import ConfigEntryNotReady
 from homeassistant.helpers import aiohttp_client
 from homeassistant.helpers.dispatcher import (
@@ -42,14 +47,10 @@ TOPIC_UPDATE = f"{DOMAIN}_data_update"
 PLATFORMS = ["binary_sensor", "sensor"]
 
 
-async def async_setup(hass, config):
-    """Set up the OpenUV component."""
-    hass.data[DOMAIN] = {DATA_CLIENT: {}, DATA_LISTENER: {}}
-    return True
-
-
-async def async_setup_entry(hass, config_entry):
+async def async_setup_entry(hass: HomeAssistant, config_entry: ConfigEntry) -> bool:
     """Set up OpenUV as config entry."""
+    hass.data.setdefault(DOMAIN, {DATA_CLIENT: {}, DATA_LISTENER: {}})
+
     _verify_domain_control = verify_domain_control(hass, DOMAIN)
 
     try:
@@ -72,21 +73,21 @@ async def async_setup_entry(hass, config_entry):
     hass.config_entries.async_setup_platforms(config_entry, PLATFORMS)
 
     @_verify_domain_control
-    async def update_data(service):
+    async def update_data(_: ServiceCall) -> None:
         """Refresh all OpenUV data."""
         LOGGER.debug("Refreshing all OpenUV data")
         await openuv.async_update()
         async_dispatcher_send(hass, TOPIC_UPDATE)
 
     @_verify_domain_control
-    async def update_uv_index_data(service):
+    async def update_uv_index_data(_: ServiceCall) -> None:
         """Refresh OpenUV UV index data."""
         LOGGER.debug("Refreshing OpenUV UV index data")
         await openuv.async_update_uv_index_data()
         async_dispatcher_send(hass, TOPIC_UPDATE)
 
     @_verify_domain_control
-    async def update_protection_data(service):
+    async def update_protection_data(_: ServiceCall) -> None:
         """Refresh OpenUV protection window data."""
         LOGGER.debug("Refreshing OpenUV protection window data")
         await openuv.async_update_protection_data()
@@ -102,7 +103,7 @@ async def async_setup_entry(hass, config_entry):
     return True
 
 
-async def async_unload_entry(hass, config_entry):
+async def async_unload_entry(hass: HomeAssistant, config_entry: ConfigEntry) -> bool:
     """Unload an OpenUV config entry."""
     unload_ok = await hass.config_entries.async_unload_platforms(
         config_entry, PLATFORMS
@@ -113,7 +114,7 @@ async def async_unload_entry(hass, config_entry):
     return unload_ok
 
 
-async def async_migrate_entry(hass, config_entry):
+async def async_migrate_entry(hass: HomeAssistant, config_entry: ConfigEntry) -> bool:
     """Migrate the config entry upon new versions."""
     version = config_entry.version
     data = {**config_entry.data}
@@ -134,12 +135,12 @@ async def async_migrate_entry(hass, config_entry):
 class OpenUV:
     """Define a generic OpenUV object."""
 
-    def __init__(self, client):
+    def __init__(self, client: Client) -> None:
         """Initialize."""
         self.client = client
-        self.data = {}
+        self.data: dict[str, Any] = {}
 
-    async def async_update_protection_data(self):
+    async def async_update_protection_data(self) -> None:
         """Update binary sensor (protection window) data."""
         try:
             resp = await self.client.uv_protection_window()
@@ -148,7 +149,7 @@ class OpenUV:
             LOGGER.error("Error during protection data update: %s", err)
             self.data[DATA_PROTECTION_WINDOW] = {}
 
-    async def async_update_uv_index_data(self):
+    async def async_update_uv_index_data(self) -> None:
         """Update sensor (uv index, etc) data."""
         try:
             data = await self.client.uv_index()
@@ -157,7 +158,7 @@ class OpenUV:
             LOGGER.error("Error during uv index data update: %s", err)
             self.data[DATA_UV] = {}
 
-    async def async_update(self):
+    async def async_update(self) -> None:
         """Update sensor/binary sensor data."""
         tasks = [self.async_update_protection_data(), self.async_update_uv_index_data()]
         await asyncio.gather(*tasks)
@@ -166,9 +167,11 @@ class OpenUV:
 class OpenUvEntity(Entity):
     """Define a generic OpenUV entity."""
 
-    def __init__(self, openuv, sensor_type):
+    def __init__(self, openuv: OpenUV, sensor_type: str) -> None:
         """Initialize."""
-        self._attr_extra_state_attributes = {ATTR_ATTRIBUTION: DEFAULT_ATTRIBUTION}
+        self._attr_extra_state_attributes: MutableMapping[str, Any] = {
+            ATTR_ATTRIBUTION: DEFAULT_ATTRIBUTION
+        }
         self._attr_should_poll = False
         self._attr_unique_id = (
             f"{openuv.client.latitude}_{openuv.client.longitude}_{sensor_type}"
@@ -176,11 +179,11 @@ class OpenUvEntity(Entity):
         self._sensor_type = sensor_type
         self.openuv = openuv
 
-    async def async_added_to_hass(self):
+    async def async_added_to_hass(self) -> None:
         """Register callbacks."""
 
         @callback
-        def update():
+        def update() -> None:
             """Update the state."""
             self.update_from_latest_data()
             self.async_write_ha_state()
@@ -189,6 +192,6 @@ class OpenUvEntity(Entity):
 
         self.update_from_latest_data()
 
-    def update_from_latest_data(self):
+    def update_from_latest_data(self) -> None:
         """Update the sensor using the latest data."""
         raise NotImplementedError
diff --git a/homeassistant/components/openuv/binary_sensor.py b/homeassistant/components/openuv/binary_sensor.py
index eac67909b86..12b1f0c82af 100644
--- a/homeassistant/components/openuv/binary_sensor.py
+++ b/homeassistant/components/openuv/binary_sensor.py
@@ -1,9 +1,11 @@
 """Support for OpenUV binary sensors."""
 from homeassistant.components.binary_sensor import BinarySensorEntity
-from homeassistant.core import callback
+from homeassistant.config_entries import ConfigEntry
+from homeassistant.core import HomeAssistant, callback
+from homeassistant.helpers.entity_platform import AddEntitiesCallback
 from homeassistant.util.dt import as_local, parse_datetime, utcnow
 
-from . import OpenUvEntity
+from . import OpenUV, OpenUvEntity
 from .const import (
     DATA_CLIENT,
     DATA_PROTECTION_WINDOW,
@@ -20,7 +22,9 @@ ATTR_PROTECTION_WINDOW_STARTING_UV = "start_uv"
 BINARY_SENSORS = {TYPE_PROTECTION_WINDOW: ("Protection Window", "mdi:sunglasses")}
 
 
-async def async_setup_entry(hass, entry, async_add_entities):
+async def async_setup_entry(
+    hass: HomeAssistant, entry: ConfigEntry, async_add_entities: AddEntitiesCallback
+) -> None:
     """Set up an OpenUV sensor based on a config entry."""
     openuv = hass.data[DOMAIN][DATA_CLIENT][entry.entry_id]
 
@@ -35,7 +39,7 @@ async def async_setup_entry(hass, entry, async_add_entities):
 class OpenUvBinarySensor(OpenUvEntity, BinarySensorEntity):
     """Define a binary sensor for OpenUV."""
 
-    def __init__(self, openuv, sensor_type, name, icon):
+    def __init__(self, openuv: OpenUV, sensor_type: str, name: str, icon: str) -> None:
         """Initialize the sensor."""
         super().__init__(openuv, sensor_type)
 
@@ -43,7 +47,7 @@ class OpenUvBinarySensor(OpenUvEntity, BinarySensorEntity):
         self._attr_name = name
 
     @callback
-    def update_from_latest_data(self):
+    def update_from_latest_data(self) -> None:
         """Update the state."""
         data = self.openuv.data[DATA_PROTECTION_WINDOW]
 
@@ -59,20 +63,24 @@ class OpenUvBinarySensor(OpenUvEntity, BinarySensorEntity):
                 return
 
         if self._sensor_type == TYPE_PROTECTION_WINDOW:
-            self._attr_is_on = (
-                parse_datetime(data["from_time"])
-                <= utcnow()
-                <= parse_datetime(data["to_time"])
-            )
+            from_dt = parse_datetime(data["from_time"])
+            to_dt = parse_datetime(data["to_time"])
+
+            if not from_dt or not to_dt:
+                LOGGER.warning(
+                    "Unable to parse protection window datetimes: %s, %s",
+                    data["from_time"],
+                    data["to_time"],
+                )
+                self._attr_is_on = False
+                return
+
+            self._attr_is_on = from_dt <= utcnow() <= to_dt
             self._attr_extra_state_attributes.update(
                 {
-                    ATTR_PROTECTION_WINDOW_ENDING_TIME: as_local(
-                        parse_datetime(data["to_time"])
-                    ),
+                    ATTR_PROTECTION_WINDOW_ENDING_TIME: as_local(to_dt),
                     ATTR_PROTECTION_WINDOW_ENDING_UV: data["to_uv"],
                     ATTR_PROTECTION_WINDOW_STARTING_UV: data["from_uv"],
-                    ATTR_PROTECTION_WINDOW_STARTING_TIME: as_local(
-                        parse_datetime(data["from_time"])
-                    ),
+                    ATTR_PROTECTION_WINDOW_STARTING_TIME: as_local(from_dt),
                 }
             )
diff --git a/homeassistant/components/openuv/config_flow.py b/homeassistant/components/openuv/config_flow.py
index e31cef9ee0a..54b2aca0b75 100644
--- a/homeassistant/components/openuv/config_flow.py
+++ b/homeassistant/components/openuv/config_flow.py
@@ -1,4 +1,8 @@
 """Config flow to configure the OpenUV component."""
+from __future__ import annotations
+
+from typing import Any
+
 from pyopenuv import Client
 from pyopenuv.errors import OpenUvError
 import voluptuous as vol
@@ -10,6 +14,7 @@ from homeassistant.const import (
     CONF_LATITUDE,
     CONF_LONGITUDE,
 )
+from homeassistant.data_entry_flow import FlowResult
 from homeassistant.helpers import aiohttp_client, config_validation as cv
 
 from .const import DOMAIN
@@ -21,7 +26,7 @@ class OpenUvFlowHandler(config_entries.ConfigFlow, domain=DOMAIN):
     VERSION = 2
 
     @property
-    def config_schema(self):
+    def config_schema(self) -> vol.Schema:
         """Return the config schema."""
         return vol.Schema(
             {
@@ -38,7 +43,7 @@ class OpenUvFlowHandler(config_entries.ConfigFlow, domain=DOMAIN):
             }
         )
 
-    async def _show_form(self, errors=None):
+    async def _show_form(self, errors: dict[str, Any] | None = None) -> FlowResult:
         """Show the form to the user."""
         return self.async_show_form(
             step_id="user",
@@ -46,11 +51,13 @@ class OpenUvFlowHandler(config_entries.ConfigFlow, domain=DOMAIN):
             errors=errors if errors else {},
         )
 
-    async def async_step_import(self, import_config):
+    async def async_step_import(self, import_config: dict[str, Any]) -> FlowResult:
         """Import a config entry from configuration.yaml."""
         return await self.async_step_user(import_config)
 
-    async def async_step_user(self, user_input=None):
+    async def async_step_user(
+        self, user_input: dict[str, Any] | None = None
+    ) -> FlowResult:
         """Handle the start of the config flow."""
         if not user_input:
             return await self._show_form()
diff --git a/homeassistant/components/openuv/sensor.py b/homeassistant/components/openuv/sensor.py
index 6f4e4e18d34..386527ebc3e 100644
--- a/homeassistant/components/openuv/sensor.py
+++ b/homeassistant/components/openuv/sensor.py
@@ -1,10 +1,14 @@
 """Support for OpenUV sensors."""
+from __future__ import annotations
+
 from homeassistant.components.sensor import SensorEntity
+from homeassistant.config_entries import ConfigEntry
 from homeassistant.const import TIME_MINUTES, UV_INDEX
-from homeassistant.core import callback
+from homeassistant.core import HomeAssistant, callback
+from homeassistant.helpers.entity_platform import AddEntitiesCallback
 from homeassistant.util.dt import as_local, parse_datetime
 
-from . import OpenUvEntity
+from . import OpenUV, OpenUvEntity
 from .const import (
     DATA_CLIENT,
     DATA_UV,
@@ -76,7 +80,9 @@ SENSORS = {
 }
 
 
-async def async_setup_entry(hass, entry, async_add_entities):
+async def async_setup_entry(
+    hass: HomeAssistant, entry: ConfigEntry, async_add_entities: AddEntitiesCallback
+) -> None:
     """Set up a OpenUV sensor based on a config entry."""
     openuv = hass.data[DOMAIN][DATA_CLIENT][entry.entry_id]
 
@@ -91,7 +97,9 @@ async def async_setup_entry(hass, entry, async_add_entities):
 class OpenUvSensor(OpenUvEntity, SensorEntity):
     """Define a binary sensor for OpenUV."""
 
-    def __init__(self, openuv, sensor_type, name, icon, unit):
+    def __init__(
+        self, openuv: OpenUV, sensor_type: str, name: str, icon: str, unit: str | None
+    ) -> None:
         """Initialize the sensor."""
         super().__init__(openuv, sensor_type)
 
@@ -100,7 +108,7 @@ class OpenUvSensor(OpenUvEntity, SensorEntity):
         self._attr_unit_of_measurement = unit
 
     @callback
-    def update_from_latest_data(self):
+    def update_from_latest_data(self) -> None:
         """Update the state."""
         data = self.openuv.data[DATA_UV].get("result")
 
@@ -127,9 +135,11 @@ class OpenUvSensor(OpenUvEntity, SensorEntity):
                 self._attr_state = UV_LEVEL_LOW
         elif self._sensor_type == TYPE_MAX_UV_INDEX:
             self._attr_state = data["uv_max"]
-            self._attr_extra_state_attributes.update(
-                {ATTR_MAX_UV_TIME: as_local(parse_datetime(data["uv_max_time"]))}
-            )
+            uv_max_time = parse_datetime(data["uv_max_time"])
+            if uv_max_time:
+                self._attr_extra_state_attributes.update(
+                    {ATTR_MAX_UV_TIME: as_local(uv_max_time)}
+                )
         elif self._sensor_type in (
             TYPE_SAFE_EXPOSURE_TIME_1,
             TYPE_SAFE_EXPOSURE_TIME_2,
diff --git a/mypy.ini b/mypy.ini
index 014272f0022..5c3b2835f72 100644
--- a/mypy.ini
+++ b/mypy.ini
@@ -759,6 +759,17 @@ no_implicit_optional = true
 warn_return_any = true
 warn_unreachable = true
 
+[mypy-homeassistant.components.openuv.*]
+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.persistent_notification.*]
 check_untyped_defs = true
 disallow_incomplete_defs = true
diff --git a/tests/components/openuv/test_config_flow.py b/tests/components/openuv/test_config_flow.py
index 83626c2d9f6..3feeb2638b4 100644
--- a/tests/components/openuv/test_config_flow.py
+++ b/tests/components/openuv/test_config_flow.py
@@ -2,7 +2,6 @@
 from unittest.mock import patch
 
 from pyopenuv.errors import InvalidApiKeyError
-import pytest
 
 from homeassistant import data_entry_flow
 from homeassistant.components.openuv import DOMAIN
@@ -17,19 +16,6 @@ from homeassistant.const import (
 from tests.common import MockConfigEntry
 
 
-@pytest.fixture(autouse=True)
-def mock_setup():
-    """Prevent setup."""
-    with patch(
-        "homeassistant.components.openuv.async_setup",
-        return_value=True,
-    ), patch(
-        "homeassistant.components.openuv.async_setup_entry",
-        return_value=True,
-    ):
-        yield
-
-
 async def test_duplicate_error(hass):
     """Test that errors are shown when duplicates are added."""
     conf = {
@@ -81,7 +67,7 @@ async def test_step_user(hass):
     }
 
     with patch(
-        "homeassistant.components.airvisual.async_setup_entry", return_value=True
+        "homeassistant.components.openuv.async_setup_entry", return_value=True
     ), patch("pyopenuv.client.Client.uv_index"):
         result = await hass.config_entries.flow.async_init(
             DOMAIN, context={"source": SOURCE_USER}