diff --git a/homeassistant/components/tahoma/__init__.py b/homeassistant/components/tahoma/__init__.py
index f3dd51bed96..1a6b326f4e5 100644
--- a/homeassistant/components/tahoma/__init__.py
+++ b/homeassistant/components/tahoma/__init__.py
@@ -66,6 +66,8 @@ TAHOMA_TYPES = {
     "rts:RollerShutterRTSComponent": "cover",
     "rts:OnOffRTSComponent": "switch",
     "rts:VenetianBlindRTSComponent": "cover",
+    "somfythermostat:SomfyThermostatTemperatureSensor": "sensor",
+    "somfythermostat:SomfyThermostatHumiditySensor": "sensor",
 }
 
 
diff --git a/homeassistant/components/tahoma/sensor.py b/homeassistant/components/tahoma/sensor.py
index 20364a243b3..8ceb07e1a9f 100644
--- a/homeassistant/components/tahoma/sensor.py
+++ b/homeassistant/components/tahoma/sensor.py
@@ -56,6 +56,13 @@ class TahomaSensor(TahomaDevice, Entity):
             return None
         if self.tahoma_device.type == "rtds:RTDSMotionSensor":
             return None
+        if (
+            self.tahoma_device.type
+            == "somfythermostat:SomfyThermostatTemperatureSensor"
+        ):
+            return TEMP_CELSIUS
+        if self.tahoma_device.type == "somfythermostat:SomfyThermostatHumiditySensor":
+            return UNIT_PERCENTAGE
 
     def update(self):
         """Update the state."""
@@ -86,6 +93,19 @@ class TahomaSensor(TahomaDevice, Entity):
                 float(self.tahoma_device.active_states["core:TemperatureState"]), 1
             )
             self._available = True
+        if (
+            self.tahoma_device.type
+            == "somfythermostat:SomfyThermostatTemperatureSensor"
+        ):
+            self.current_value = float(
+                f"{self.tahoma_device.active_states['core:TemperatureState']:.2f}"
+            )
+            self._available = True
+        if self.tahoma_device.type == "somfythermostat:SomfyThermostatHumiditySensor":
+            self.current_value = float(
+                f"{self.tahoma_device.active_states['core:RelativeHumidityState']:.2f}"
+            )
+            self._available = True
 
         _LOGGER.debug("Update %s, value: %d", self._name, self.current_value)