What is the appropriate temperature inside a car?

[StJulianna]

The appropriate temperature inside a car is between 20°C and 27°C. If it exceeds 28°C, people will feel hot, and if it drops below 14°C, people will feel cold. It is necessary to regularly switch between the internal and external air circulation modes in the car. If the car remains in internal air circulation mode for a long time, the oxygen level inside the car will gradually decrease, and carbon monoxide produced by the engine may accumulate inside, which can easily lead to poisoning. Regularly activating the external air circulation mode can bring fresh air into the car. In summer, a car parked under the scorching sun may reach temperatures as high as 60-70°C inside. In such cases, it is advisable to first open the doors and windows, wait for two to three minutes to let the hot air escape before entering and starting the car. Do not close the windows immediately; instead, turn on the external air circulation of the air conditioner first. Once the temperature inside and outside the car becomes similar, you can then close the windows and switch to internal air circulation.

[StLucia]

I find maintaining the car interior temperature around 22°C most comfortable - neither too high nor too low, preventing sweating from heat or shivering from cold while driving. As a frequent commuter, I've observed this temperature helps maintain focus and avoid fatigued driving. In summer, higher temperatures induce drowsiness, while winter's lower settings cause shivering, both impairing reaction times. Additionally, set fan speed to moderate, preferably in auto mode, coupled with air recirculation to minimize external pollutant intake. Humidity control matters too - increase ventilation when too dry, activate AC dehumidification when too damp. Remember, temperature preferences vary - elderly and children may need slightly higher settings, but generally 20-23°C is safe. Make seasonal micro-adjustments: maintain 22°C in spring/autumn, shift toward 21°C or 23°C in winter/summer to optimize AC efficiency and reduce fuel consumption.

[DiCamille]

As a mom, I pay special attention to the in-car temperature and recommend setting it at 21°C, which keeps the kids comfortable without catching a cold. In winter, avoid exceeding 23°C to prevent dry skin from itching. In summer, don’t go below 20°C to avoid cold drafts making them sick. When using the AC, avoid keeping it on high speed all the time—adjust the fan speed in stages, like medium at startup and low once stabilized. Also, consider other factors, like using sunshades when sunlight is strong, or ventilating the car by opening windows before closing them after parking to prevent heat buildup. Regularly cleaning the AC filter is crucial to avoid bacterial spread. This not only ensures comfort but also protects your family’s health, reduces cold risks, and saves fuel and money in the long run.

[Steven]

The most suitable in-car temperature is 20-22°C, which balances comfort and safe driving efficiency. Too high increases fatigue risk, while too low causes discomfort. Air conditioning should be set to medium fan speed with auto mode to optimize energy usage. Slight seasonal adjustments are recommended—22°C in summer and 21°C in winter for better results. Additionally, maintain humidity control to avoid dryness, and regularly check the vehicle's AC system to ensure proper function and reduce malfunctions.

[StephanieDella]

After driving for twenty years, I've found that setting the temperature around 21 degrees Celsius is the most reliable. This temperature keeps you warm without overheating in winter and cool without freezing in summer, ensuring flexible hands and feet and good concentration while driving. I remember once on a long highway trip, the high temperature almost made me doze off, but adjusting it back to 21 degrees in time prevented an accident. Additionally, consider environmental factors, such as using the external circulation to cool down first when exposed to strong sunlight before switching to internal circulation. Fine-tune slightly with speed changes—maintain 21 degrees on highways and slightly higher in city traffic jams. Regular maintenance of the air conditioning, replacing filters to prevent odors, ensures safe air circulation. This approach is both comfortable and efficient, saving a lot on fuel.