Add support for outdoor_temperature in Thermostat cluster

zha/application/platforms/climate/__init__.py

@@ -150,6 +150,7 @@ def state(self) -> dict[str, Any]:
 
         response = super().state
         response["current_temperature"] = self.current_temperature
+        response["outdoor_temperature"] = self.outdoor_temperature
         response["target_temperature"] = self.target_temperature
         response["target_temperature_high"] = self.target_temperature_high
         response["target_temperature_low"] = self.target_temperature_low
@@ -179,6 +180,13 @@ def current_temperature(self):
             return None
         return self._thermostat_cluster_handler.local_temperature / ZCL_TEMP
 
+    @property
+    def outdoor_temperature(self):
+        """Return the outdoor temperature."""
+        if self._thermostat_cluster_handler.outdoor_temperature is None:
+            return None
+        return self._thermostat_cluster_handler.outdoor_temperature / ZCL_TEMP
+
     @property
     def fan_mode(self) -> str | None:
         """Return current FAN mode."""

zha/zigbee/cluster_handlers/hvac.py

@@ -208,6 +208,11 @@ def local_temperature(self) -> int | None:
         """Thermostat temperature."""
         return self.cluster.get(Thermostat.AttributeDefs.local_temperature.name)
 
+    @property
+    def outdoor_temperature(self) -> int | None:
+        """Thermostat outdoor temperature."""
+        return self.cluster.get(Thermostat.AttributeDefs.outdoor_temperature.name)
+
     @property
     def occupancy(self) -> int | None:
         """Is occupancy detected."""