diff --git a/.strict-typing b/.strict-typing
index 3e14772318c8..e79fb6b1a26a 100644
--- a/.strict-typing
+++ b/.strict-typing
@@ -260,6 +260,7 @@ homeassistant.components.tag.*
 homeassistant.components.tailscale.*
 homeassistant.components.tautulli.*
 homeassistant.components.tcp.*
+homeassistant.components.tibber.*
 homeassistant.components.tile.*
 homeassistant.components.tilt_ble.*
 homeassistant.components.tolo.*
diff --git a/homeassistant/components/tibber/__init__.py b/homeassistant/components/tibber/__init__.py
index 34f5843412ee..35507986f90d 100644
--- a/homeassistant/components/tibber/__init__.py
+++ b/homeassistant/components/tibber/__init__.py
@@ -12,7 +12,7 @@ from homeassistant.const import (
     EVENT_HOMEASSISTANT_STOP,
     Platform,
 )
-from homeassistant.core import HomeAssistant
+from homeassistant.core import Event, HomeAssistant
 from homeassistant.exceptions import ConfigEntryNotReady
 from homeassistant.helpers import discovery
 from homeassistant.helpers.aiohttp_client import async_get_clientsession
@@ -46,7 +46,7 @@ async def async_setup_entry(hass: HomeAssistant, entry: ConfigEntry) -> bool:
     )
     hass.data[DOMAIN] = tibber_connection
 
-    async def _close(event):
+    async def _close(event: Event) -> None:
         await tibber_connection.rt_disconnect()
 
     entry.async_on_unload(hass.bus.async_listen_once(EVENT_HOMEASSISTANT_STOP, _close))
diff --git a/homeassistant/components/tibber/config_flow.py b/homeassistant/components/tibber/config_flow.py
index 4e804225c568..d0adc0391abf 100644
--- a/homeassistant/components/tibber/config_flow.py
+++ b/homeassistant/components/tibber/config_flow.py
@@ -1,5 +1,8 @@
 """Adds config flow for Tibber integration."""
+from __future__ import annotations
+
 import asyncio
+from typing import Any
 
 import aiohttp
 import tibber
@@ -7,6 +10,7 @@ import voluptuous as vol
 
 from homeassistant import config_entries
 from homeassistant.const import CONF_ACCESS_TOKEN
+from homeassistant.data_entry_flow import FlowResult
 from homeassistant.helpers.aiohttp_client import async_get_clientsession
 
 from .const import DOMAIN
@@ -19,7 +23,9 @@ class TibberConfigFlow(config_entries.ConfigFlow, domain=DOMAIN):
 
     VERSION = 1
 
-    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 initial step."""
 
         self._async_abort_entries_match()
diff --git a/homeassistant/components/tibber/manifest.json b/homeassistant/components/tibber/manifest.json
index dcb15d55002d..5341febc62af 100644
--- a/homeassistant/components/tibber/manifest.json
+++ b/homeassistant/components/tibber/manifest.json
@@ -3,7 +3,7 @@
   "domain": "tibber",
   "name": "Tibber",
   "documentation": "https://www.home-assistant.io/integrations/tibber",
-  "requirements": ["pyTibber==0.25.4"],
+  "requirements": ["pyTibber==0.25.6"],
   "codeowners": ["@danielhiversen"],
   "quality_scale": "silver",
   "config_flow": true,
diff --git a/homeassistant/components/tibber/notify.py b/homeassistant/components/tibber/notify.py
index ab912eb33dab..270528fc4e9c 100644
--- a/homeassistant/components/tibber/notify.py
+++ b/homeassistant/components/tibber/notify.py
@@ -1,19 +1,29 @@
 """Support for Tibber notifications."""
+from __future__ import annotations
+
 import asyncio
+from collections.abc import Callable
 import logging
+from typing import Any
 
 from homeassistant.components.notify import (
     ATTR_TITLE,
     ATTR_TITLE_DEFAULT,
     BaseNotificationService,
 )
+from homeassistant.core import HomeAssistant
+from homeassistant.helpers.typing import ConfigType, DiscoveryInfoType
 
 from . import DOMAIN as TIBBER_DOMAIN
 
 _LOGGER = logging.getLogger(__name__)
 
 
-async def async_get_service(hass, config, discovery_info=None):
+async def async_get_service(
+    hass: HomeAssistant,
+    config: ConfigType,
+    discovery_info: DiscoveryInfoType | None = None,
+) -> TibberNotificationService:
     """Get the Tibber notification service."""
     tibber_connection = hass.data[TIBBER_DOMAIN]
     return TibberNotificationService(tibber_connection.send_notification)
@@ -22,11 +32,11 @@ async def async_get_service(hass, config, discovery_info=None):
 class TibberNotificationService(BaseNotificationService):
     """Implement the notification service for Tibber."""
 
-    def __init__(self, notify):
+    def __init__(self, notify: Callable) -> None:
         """Initialize the service."""
         self._notify = notify
 
-    async def async_send_message(self, message=None, **kwargs):
+    async def async_send_message(self, message: str = "", **kwargs: Any) -> None:
         """Send a message to Tibber devices."""
         title = kwargs.get(ATTR_TITLE, ATTR_TITLE_DEFAULT)
         try:
diff --git a/homeassistant/components/tibber/sensor.py b/homeassistant/components/tibber/sensor.py
index ca0c253590f3..4dcc4a8a7775 100644
--- a/homeassistant/components/tibber/sensor.py
+++ b/homeassistant/components/tibber/sensor.py
@@ -2,11 +2,14 @@
 from __future__ import annotations
 
 import asyncio
+import datetime
 from datetime import timedelta
 import logging
 from random import randrange
+from typing import Any
 
 import aiohttp
+import tibber
 
 from homeassistant.components.recorder import get_instance
 from homeassistant.components.recorder.models import StatisticData, StatisticMetaData
@@ -31,7 +34,7 @@ from homeassistant.const import (
     POWER_WATT,
     SIGNAL_STRENGTH_DECIBELS,
 )
-from homeassistant.core import HomeAssistant, callback
+from homeassistant.core import Event, HomeAssistant, callback
 from homeassistant.exceptions import PlatformNotReady
 from homeassistant.helpers.device_registry import async_get as async_get_dev_reg
 from homeassistant.helpers.entity import DeviceInfo, EntityCategory
@@ -296,7 +299,9 @@ async def async_setup_entry(
 class TibberSensor(SensorEntity):
     """Representation of a generic Tibber sensor."""
 
-    def __init__(self, *args, tibber_home, **kwargs):
+    def __init__(
+        self, *args: Any, tibber_home: tibber.TibberHome, **kwargs: Any
+    ) -> None:
         """Initialize the sensor."""
         super().__init__(*args, **kwargs)
         self._tibber_home = tibber_home
@@ -305,11 +310,11 @@ class TibberSensor(SensorEntity):
             self._home_name = tibber_home.info["viewer"]["home"]["address"].get(
                 "address1", ""
             )
-        self._device_name = None
-        self._model = None
+        self._device_name: None | str = None
+        self._model: None | str = None
 
     @property
-    def device_info(self):
+    def device_info(self) -> DeviceInfo:
         """Return the device_info of the device."""
         device_info = DeviceInfo(
             identifiers={(TIBBER_DOMAIN, self._tibber_home.home_id)},
@@ -324,10 +329,10 @@ class TibberSensor(SensorEntity):
 class TibberSensorElPrice(TibberSensor):
     """Representation of a Tibber sensor for el price."""
 
-    def __init__(self, tibber_home):
+    def __init__(self, tibber_home: tibber.TibberHome) -> None:
         """Initialize the sensor."""
         super().__init__(tibber_home=tibber_home)
-        self._last_updated = None
+        self._last_updated: datetime.datetime | None = None
         self._spread_load_constant = randrange(5000)
 
         self._attr_available = False
@@ -380,7 +385,7 @@ class TibberSensorElPrice(TibberSensor):
         self._attr_native_unit_of_measurement = self._tibber_home.price_unit
 
     @Throttle(MIN_TIME_BETWEEN_UPDATES)
-    async def _fetch_data(self):
+    async def _fetch_data(self) -> None:
         _LOGGER.debug("Fetching data")
         try:
             await self._tibber_home.update_info_and_price_info()
@@ -401,10 +406,10 @@ class TibberDataSensor(TibberSensor, CoordinatorEntity["TibberDataCoordinator"])
 
     def __init__(
         self,
-        tibber_home,
+        tibber_home: tibber.TibberHome,
         coordinator: TibberDataCoordinator,
         entity_description: SensorEntityDescription,
-    ):
+    ) -> None:
         """Initialize the sensor."""
         super().__init__(coordinator=coordinator, tibber_home=tibber_home)
         self.entity_description = entity_description
@@ -419,7 +424,7 @@ class TibberDataSensor(TibberSensor, CoordinatorEntity["TibberDataCoordinator"])
         self._device_name = self._home_name
 
     @property
-    def native_value(self):
+    def native_value(self) -> Any:
         """Return the value of the sensor."""
         return getattr(self._tibber_home, self.entity_description.key)
 
@@ -429,11 +434,11 @@ class TibberSensorRT(TibberSensor, CoordinatorEntity["TibberRtDataCoordinator"])
 
     def __init__(
         self,
-        tibber_home,
+        tibber_home: tibber.TibberHome,
         description: SensorEntityDescription,
-        initial_state,
+        initial_state: float,
         coordinator: TibberRtDataCoordinator,
-    ):
+    ) -> None:
         """Initialize the sensor."""
         super().__init__(coordinator=coordinator, tibber_home=tibber_home)
         self.entity_description = description
@@ -486,12 +491,17 @@ class TibberSensorRT(TibberSensor, CoordinatorEntity["TibberRtDataCoordinator"])
 class TibberRtDataCoordinator(DataUpdateCoordinator):
     """Handle Tibber realtime data."""
 
-    def __init__(self, async_add_entities, tibber_home, hass):
+    def __init__(
+        self,
+        async_add_entities: AddEntitiesCallback,
+        tibber_home: tibber.TibberHome,
+        hass: HomeAssistant,
+    ) -> None:
         """Initialize the data handler."""
         self._async_add_entities = async_add_entities
         self._tibber_home = tibber_home
         self.hass = hass
-        self._added_sensors = set()
+        self._added_sensors: set[str] = set()
         super().__init__(
             hass,
             _LOGGER,
@@ -506,12 +516,12 @@ class TibberRtDataCoordinator(DataUpdateCoordinator):
         hass.bus.async_listen_once(EVENT_HOMEASSISTANT_STOP, self._handle_ha_stop)
 
     @callback
-    def _handle_ha_stop(self, _event) -> None:
+    def _handle_ha_stop(self, _event: Event) -> None:
         """Handle Home Assistant stopping."""
         self._async_remove_device_updates_handler()
 
     @callback
-    def _add_sensors(self):
+    def _add_sensors(self) -> None:
         """Add sensor."""
         if not (live_measurement := self.get_live_measurement()):
             return
@@ -534,7 +544,7 @@ class TibberRtDataCoordinator(DataUpdateCoordinator):
         if new_entities:
             self._async_add_entities(new_entities)
 
-    def get_live_measurement(self):
+    def get_live_measurement(self) -> Any:
         """Get live measurement data."""
         if errors := self.data.get("errors"):
             _LOGGER.error(errors[0])
@@ -545,7 +555,7 @@ class TibberRtDataCoordinator(DataUpdateCoordinator):
 class TibberDataCoordinator(DataUpdateCoordinator):
     """Handle Tibber data and insert statistics."""
 
-    def __init__(self, hass, tibber_connection):
+    def __init__(self, hass: HomeAssistant, tibber_connection: tibber.Tibber) -> None:
         """Initialize the data handler."""
         super().__init__(
             hass,
@@ -555,13 +565,13 @@ class TibberDataCoordinator(DataUpdateCoordinator):
         )
         self._tibber_connection = tibber_connection
 
-    async def _async_update_data(self):
+    async def _async_update_data(self) -> None:
         """Update data via API."""
         await self._tibber_connection.fetch_consumption_data_active_homes()
         await self._tibber_connection.fetch_production_data_active_homes()
         await self._insert_statistics()
 
-    async def _insert_statistics(self):
+    async def _insert_statistics(self) -> None:
         """Insert Tibber statistics."""
         for home in self._tibber_connection.get_homes():
             sensors = []
@@ -602,9 +612,10 @@ class TibberDataCoordinator(DataUpdateCoordinator):
                         else home.hourly_consumption_data
                     )
 
-                    start = dt_util.parse_datetime(hourly_data[0]["from"]) - timedelta(
-                        hours=1
-                    )
+                    from_time = dt_util.parse_datetime(hourly_data[0]["from"])
+                    if from_time is None:
+                        continue
+                    start = from_time - timedelta(hours=1)
                     stat = await get_instance(self.hass).async_add_executor_job(
                         statistics_during_period,
                         self.hass,
@@ -623,15 +634,17 @@ class TibberDataCoordinator(DataUpdateCoordinator):
                     if data.get(sensor_type) is None:
                         continue
 
-                    start = dt_util.parse_datetime(data["from"])
-                    if last_stats_time is not None and start <= last_stats_time:
+                    from_time = dt_util.parse_datetime(data["from"])
+                    if from_time is None or (
+                        last_stats_time is not None and from_time <= last_stats_time
+                    ):
                         continue
 
                     _sum += data[sensor_type]
 
                     statistics.append(
                         StatisticData(
-                            start=start,
+                            start=from_time,
                             state=data[sensor_type],
                             sum=_sum,
                         )
diff --git a/mypy.ini b/mypy.ini
index 846f91303e60..cd6bc14169d0 100644
--- a/mypy.ini
+++ b/mypy.ini
@@ -2353,6 +2353,16 @@ disallow_untyped_defs = true
 warn_return_any = true
 warn_unreachable = true
 
+[mypy-homeassistant.components.tibber.*]
+check_untyped_defs = true
+disallow_incomplete_defs = true
+disallow_subclassing_any = true
+disallow_untyped_calls = true
+disallow_untyped_decorators = true
+disallow_untyped_defs = true
+warn_return_any = true
+warn_unreachable = true
+
 [mypy-homeassistant.components.tile.*]
 check_untyped_defs = true
 disallow_incomplete_defs = true
diff --git a/requirements_all.txt b/requirements_all.txt
index 78da40a9eea8..9b5b1455efa7 100644
--- a/requirements_all.txt
+++ b/requirements_all.txt
@@ -1409,7 +1409,7 @@ pyRFXtrx==0.30.0
 pySwitchmate==0.5.1
 
 # homeassistant.components.tibber
-pyTibber==0.25.4
+pyTibber==0.25.6
 
 # homeassistant.components.dlink
 pyW215==0.7.0
diff --git a/requirements_test_all.txt b/requirements_test_all.txt
index bfd614cec5a4..2b5b8c92d7bf 100644
--- a/requirements_test_all.txt
+++ b/requirements_test_all.txt
@@ -1009,7 +1009,7 @@ pyMetno==0.9.0
 pyRFXtrx==0.30.0
 
 # homeassistant.components.tibber
-pyTibber==0.25.4
+pyTibber==0.25.6
 
 # homeassistant.components.nextbus
 py_nextbusnext==0.1.5