What is the normal temperature of the weather?

What's the indoor temperature? How comfortable is the human body? Experts found through experiments that the comfortable temperature range of 80% people in winter is 17℃ to 19.2℃. When the indoor air temperature is 18℃, half of people will feel cold when sitting; When the temperature is below 12℃, 80% people will feel cold when sitting, some people will feel uncomfortable, and more than 20% people who are active will feel cold. Experts say that if the indoor temperature is around 18℃ and the relative humidity is controlled at 30% to 40%, the human body feels most comfortable. First of all, it makes people feel comfortable. As far as temperature is concerned, the temperature that makes people feel lukewarm is called "physiological zero". Physiological zero is the most comfortable temperature for people. Different people will have different physiological zero degrees. For normal healthy people, the physiological zero is about 28℃ ~ 29℃. Therefore, the temperature of the air-conditioned room should be as close as possible. Secondly, it should be beneficial to health. The indoor and outdoor temperature difference should not be too large, and it is generally between 5℃ and 10℃. If the temperature difference is too large, people will encounter sudden changes in temperature when entering and leaving, and they are prone to catch a cold and other diseases. Third, we should consider saving electricity. If the temperature is adjusted too low when cooling or too high when heating, it will consume more energy. Therefore, considering saving electricity, the room temperature should not be adjusted too low in summer and too high in winter. Therefore, on the whole, the reasonable temperature of air-conditioned rooms in summer should be 28℃ ~ 29℃. It should be18℃ ~ 20℃ in winter.