diff --git a/homeassistant/components/nut/sensor.py b/homeassistant/components/nut/sensor.py
index 7b61342866b..d2398a560b7 100644
--- a/homeassistant/components/nut/sensor.py
+++ b/homeassistant/components/nut/sensor.py
@@ -927,6 +927,7 @@ SENSOR_TYPES: Final[dict[str, SensorEntityDescription]] = {
         native_unit_of_measurement=PERCENTAGE,
         device_class=SensorDeviceClass.HUMIDITY,
         state_class=SensorStateClass.MEASUREMENT,
+        entity_category=EntityCategory.DIAGNOSTIC,
     ),
     "ambient.temperature": SensorEntityDescription(
         key="ambient.temperature",
@@ -934,6 +935,7 @@ SENSOR_TYPES: Final[dict[str, SensorEntityDescription]] = {
         native_unit_of_measurement=UnitOfTemperature.CELSIUS,
         device_class=SensorDeviceClass.TEMPERATURE,
         state_class=SensorStateClass.MEASUREMENT,
+        entity_category=EntityCategory.DIAGNOSTIC,
     ),
     "watts": SensorEntityDescription(
         key="watts",