How Cold Should Your Car’s AC Temperature Blow?

May 1, 2024 2:59 pm Published by Leave your thoughts


Driving in a car on a hot summer day can be uncomfortable if the air conditioning (AC) is not set to the right temperature. Many drivers wonder how cold their car’s AC temperature should blow to keep them cool and comfortable. The answer to this question actually depends on various factors, one of which is the ambient air temperatures. Understanding the relationship between ambient air temperatures and the AC outlet air temperature can help you set your car’s AC system to provide the optimum cooling effect.

Ambient Air Temperatures of 70 Degrees

When the ambient air temperatures are around 70 degrees Fahrenheit, a comfortable setting for your car’s AC system would be around 67 degrees. This allows for a moderate temperature differential that does not feel too cold or too warm inside the car. Setting the AC temperature slightly lower than the outside temperature helps remove moisture from the air and provides a pleasant cooling effect without feeling chilly.

AC Outlet Air Temperature

To determine how cold your car’s AC temperature should blow, it is helpful to understand the concept of AC outlet air temperature. This refers to the temperature of the air coming out of the car’s AC vents. Ideally, the AC outlet air temperature should be about 20 degrees cooler than the ambient air temperatures. For example, if the outside temperature is 90 degrees, the AC outlet air temperature should be around 70 degrees to provide effective cooling inside the car.

Factors Influencing AC Performance

Several factors can influence the performance of your car’s AC system and affect how cold the air blows. These include the condition of the AC system, the type of refrigerant used, the age of the car, and how well the system has been maintained. If you notice that your car’s AC is not blowing cold air or is not cooling the car effectively, it may be time to have it inspected and serviced by a professional mechanic.

Proper AC Maintenance

Proper maintenance of your car’s AC system is essential to ensure it functions optimally and provides cold air when needed. Regularly changing the cabin air filter, checking the refrigerant levels, and inspecting the AC components for leaks or damage can help prevent issues and maintain the efficiency of the system. It is also important to have your car’s AC system serviced by a qualified technician at least once a year to keep it in good working condition.

Tips for Cooling Your Car Efficiently

In addition to setting the right temperature for your car’s AC system, there are some other tips you can follow to cool your car efficiently on hot days. Parking in shaded areas, using sunshades or window visors, and cracking the windows slightly when parked can help reduce the heat build-up inside the car. Starting the car with the AC on a low setting a few minutes before driving can also help cool down the interior quickly.


Setting the right temperature for your car’s AC system is essential for staying cool and comfortable while driving. By understanding the relationship between ambient air temperatures and AC outlet air temperature, you can adjust the settings to provide effective cooling without feeling too cold. Regular maintenance of the AC system and following tips for cooling your car efficiently can help ensure that your AC functions properly and provides cold air when needed. Stay cool and enjoy the ride!

Need an Auto Repair Shop in Chino, CA?

Gabriel’s Automotive & Towing is a full-service auto mechanic and repair shop in Chino, CA. For over 20 years, our auto repair shop has provided expert automotive technicians that are highly trained in both foreign and domestic vehicles. It is always our goal to satisfy you and enable you to get the most out of your vehicle. A well-maintained vehicle will give you years of enjoyment. We specialize in BMW vehicles and offer work on a variety of parts, including brakes, carburetors, charging systems, air conditioning systems, electrical components, and emissions. We also perform diesel tune-ups and repairs. For drivers throughout Chino and Chino Hills, CA, give us a call or stop by the shop today!

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