diff --git a/homeassistant/helpers/entity.py b/homeassistant/helpers/entity.py
index 24f9c5a64d8..f6ff8c73bf5 100644
--- a/homeassistant/helpers/entity.py
+++ b/homeassistant/helpers/entity.py
@@ -36,7 +36,14 @@ from homeassistant.const import (
     TEMP_CELSIUS,
     TEMP_FAHRENHEIT,
 )
-from homeassistant.core import CALLBACK_TYPE, Context, Event, HomeAssistant, callback
+from homeassistant.core import (
+    CALLBACK_TYPE,
+    Context,
+    Event,
+    HomeAssistant,
+    callback,
+    split_entity_id,
+)
 from homeassistant.exceptions import HomeAssistantError, NoEntitySpecifiedError
 from homeassistant.loader import bind_hass
 from homeassistant.util import dt as dt_util, ensure_unique_string, slugify
@@ -639,9 +646,11 @@ class Entity(ABC):
         try:
             unit_of_measure = attr.get(ATTR_UNIT_OF_MEASUREMENT)
             units = self.hass.config.units
+            domain = split_entity_id(self.entity_id)[0]
             if (
                 unit_of_measure in (TEMP_CELSIUS, TEMP_FAHRENHEIT)
                 and unit_of_measure != units.temperature_unit
+                and domain != "sensor"
             ):
                 prec = len(state) - state.index(".") - 1 if "." in state else 0
                 temp = units.temperature(float(state), unit_of_measure)
diff --git a/tests/components/sensor/test_init.py b/tests/components/sensor/test_init.py
index 1d9df34f657..950c737375b 100644
--- a/tests/components/sensor/test_init.py
+++ b/tests/components/sensor/test_init.py
@@ -350,19 +350,64 @@ async def test_restore_sensor_restore_state(
 
 
 @pytest.mark.parametrize(
-    "native_unit,custom_unit,state_unit,native_value,custom_value",
+    "device_class,native_unit,custom_unit,state_unit,native_value,custom_value",
     [
         # Smaller to larger unit, InHg is ~33x larger than hPa -> 1 more decimal
-        (PRESSURE_HPA, PRESSURE_INHG, PRESSURE_INHG, 1000.0, 29.53),
-        (PRESSURE_KPA, PRESSURE_HPA, PRESSURE_HPA, 1.234, 12.34),
-        (PRESSURE_HPA, PRESSURE_MMHG, PRESSURE_MMHG, 1000, 750),
+        (
+            SensorDeviceClass.PRESSURE,
+            PRESSURE_HPA,
+            PRESSURE_INHG,
+            PRESSURE_INHG,
+            1000.0,
+            29.53,
+        ),
+        (
+            SensorDeviceClass.PRESSURE,
+            PRESSURE_KPA,
+            PRESSURE_HPA,
+            PRESSURE_HPA,
+            1.234,
+            12.34,
+        ),
+        (
+            SensorDeviceClass.PRESSURE,
+            PRESSURE_HPA,
+            PRESSURE_MMHG,
+            PRESSURE_MMHG,
+            1000,
+            750,
+        ),
         # Not a supported pressure unit
-        (PRESSURE_HPA, "peer_pressure", PRESSURE_HPA, 1000, 1000),
+        (
+            SensorDeviceClass.PRESSURE,
+            PRESSURE_HPA,
+            "peer_pressure",
+            PRESSURE_HPA,
+            1000,
+            1000,
+        ),
+        (
+            SensorDeviceClass.TEMPERATURE,
+            TEMP_CELSIUS,
+            TEMP_FAHRENHEIT,
+            TEMP_FAHRENHEIT,
+            37.5,
+            99.5,
+        ),
+        (
+            SensorDeviceClass.TEMPERATURE,
+            TEMP_FAHRENHEIT,
+            TEMP_CELSIUS,
+            TEMP_CELSIUS,
+            100,
+            38.0,
+        ),
     ],
 )
 async def test_custom_unit(
     hass,
     enable_custom_integrations,
+    device_class,
     native_unit,
     custom_unit,
     state_unit,
@@ -384,7 +429,7 @@ async def test_custom_unit(
         name="Test",
         native_value=str(native_value),
         native_unit_of_measurement=native_unit,
-        device_class=SensorDeviceClass.PRESSURE,
+        device_class=device_class,
         unique_id="very_unique",
     )