I always thought my car ran at the normal operating temperature, but now I am unsure. My temperature guage only goes beyond 80°C when I am stuck in traffic somewhere. Lately the guage has not been getting to 80°C at all until I drive the car for about a half an hour. After a half an hour is when I begin to get heat also. Is this normal for the type of weather that we have been having or do I need a new thermostat?