The sensor detects the temperature outside the vehicle.
If the vehicle has been stationary, the sensor reading may be higher than the actual temperature.
When the ambient temperature is between –5 °C and +2 °C (23 °F and 36 °F), a snowflake symbol will be displayed in the instrument panel as a warning for possible slippery conditions.
The snowflake symbol is also temporarily lit in the head-up display if the vehicle is equipped with one.
Change the measurement standard for the temperature sensor etc. via system settings in the center display's Top view.