diff --git a/homeassistant/components/number/const.py b/homeassistant/components/number/const.py
index e9c4c741e54..c10d677b773 100644
--- a/homeassistant/components/number/const.py
+++ b/homeassistant/components/number/const.py
@@ -289,7 +289,7 @@ class NumberDeviceClass(StrEnum):
     TEMPERATURE = "temperature"
     """Temperature.
 
-    Unit of measurement: `°C`, `°F`
+    Unit of measurement: `°C`, `°F`, `K`
     """
 
     VOLATILE_ORGANIC_COMPOUNDS = "volatile_organic_compounds"
@@ -384,10 +384,7 @@ DEVICE_CLASS_UNITS: dict[NumberDeviceClass, set[type[StrEnum] | str | None]] = {
     NumberDeviceClass.SOUND_PRESSURE: set(UnitOfSoundPressure),
     NumberDeviceClass.SPEED: set(UnitOfSpeed).union(set(UnitOfVolumetricFlux)),
     NumberDeviceClass.SULPHUR_DIOXIDE: {CONCENTRATION_MICROGRAMS_PER_CUBIC_METER},
-    NumberDeviceClass.TEMPERATURE: {
-        UnitOfTemperature.CELSIUS,
-        UnitOfTemperature.FAHRENHEIT,
-    },
+    NumberDeviceClass.TEMPERATURE: set(UnitOfTemperature),
     NumberDeviceClass.VOLATILE_ORGANIC_COMPOUNDS: {
         CONCENTRATION_MICROGRAMS_PER_CUBIC_METER
     },
diff --git a/homeassistant/components/sensor/const.py b/homeassistant/components/sensor/const.py
index 3c3a073a308..66d231bea24 100644
--- a/homeassistant/components/sensor/const.py
+++ b/homeassistant/components/sensor/const.py
@@ -326,7 +326,7 @@ class SensorDeviceClass(StrEnum):
     TEMPERATURE = "temperature"
     """Temperature.
 
-    Unit of measurement: `°C`, `°F`
+    Unit of measurement: `°C`, `°F`, `K`
     """
 
     VOLATILE_ORGANIC_COMPOUNDS = "volatile_organic_compounds"
@@ -484,10 +484,7 @@ DEVICE_CLASS_UNITS: dict[SensorDeviceClass, set[type[StrEnum] | str | None]] = {
     SensorDeviceClass.SOUND_PRESSURE: set(UnitOfSoundPressure),
     SensorDeviceClass.SPEED: set(UnitOfSpeed).union(set(UnitOfVolumetricFlux)),
     SensorDeviceClass.SULPHUR_DIOXIDE: {CONCENTRATION_MICROGRAMS_PER_CUBIC_METER},
-    SensorDeviceClass.TEMPERATURE: {
-        UnitOfTemperature.CELSIUS,
-        UnitOfTemperature.FAHRENHEIT,
-    },
+    SensorDeviceClass.TEMPERATURE: set(UnitOfTemperature),
     SensorDeviceClass.VOLATILE_ORGANIC_COMPOUNDS: {
         CONCENTRATION_MICROGRAMS_PER_CUBIC_METER
     },
diff --git a/tests/components/number/test_websocket_api.py b/tests/components/number/test_websocket_api.py
index f920fddd420..1cba89c42a1 100644
--- a/tests/components/number/test_websocket_api.py
+++ b/tests/components/number/test_websocket_api.py
@@ -22,7 +22,7 @@ async def test_device_class_units(hass: HomeAssistant, hass_ws_client) -> None:
     )
     msg = await client.receive_json()
     assert msg["success"]
-    assert msg["result"] == {"units": unordered(["°F", "°C"])}
+    assert msg["result"] == {"units": unordered(["°F", "°C", "K"])}
 
     # Device class with units which number doesn't allow customizing & converting
     await client.send_json(