The normal operating temperature range indicated by the temperature gauge on most cars is typically between 195-220 degrees Fahrenheit (90-105 degrees Celsius) . Ideally, your engines temperature should fall somewhere in between 90 ºC to 105 ºC degrees. Most experts agree that your engine should run between 195 degrees and 220 degrees Fahrenheit. In ideal situations, your needle will maintain a posture right in the middle of your gauge. Keep in mind that this can go up or down depending on the conditions in the vehicle itself (such as running the air conditioner or heater) . If the gauge begins to go up more than it usually does, you may have cause for concern. It is important to monitor the gauge frequently and respond quickly to deviations. If the temperature gauge needle starts to creep up to the red zone and/or the engine temperature warning light comes on, it’s a clear sign that your engine is overheating, and you should not continue to drive with an overheating engine. Continuing to let your engine run once the temperature gauge reaches the red will most likely lead to major engine damage such as head gasket failures or even complete engine failures.