diff --git a/homeassistant/components/plugwise/sensor.py b/homeassistant/components/plugwise/sensor.py
index 1d6dfbd3e90..4ee75e21a45 100644
--- a/homeassistant/components/plugwise/sensor.py
+++ b/homeassistant/components/plugwise/sensor.py
@@ -249,6 +249,13 @@ SENSORS: tuple[SensorEntityDescription, ...] = (
         device_class=SensorDeviceClass.PRESSURE,
         state_class=SensorStateClass.MEASUREMENT,
     ),
+    SensorEntityDescription(
+        key="humidity",
+        name="Relative Humidity",
+        native_unit_of_measurement=PERCENTAGE,
+        device_class=SensorDeviceClass.HUMIDITY,
+        state_class=SensorStateClass.MEASUREMENT,
+    ),
 )