What does 100% air humidity mean?

Humidity 100% refers to relative humidity. Most of the humidity in weather forecasts is relative humidity, such as 100% here. 100% means 100% of the water vapor that can be held in the air. If water vapor enters the air, it will condense into water.

The upper limit of how much water vapor can be held in the air is affected by temperature. The higher the temperature, the faster the water vapor molecules move and the less likely they are to condense. The air can hold more water vapor without condensation. Therefore, the same mass of water vapor in the air condenses easily in winter but not in summer. This is also the reason why white mist can be blown out in winter but not in summer.

Notes on air humidity

Generally speaking, there is no obvious division of air humidity, because the humidity in different areas is different. The most suitable ambient humidity for most people is between 40% and 60%. If the air humidity is not reached, it can easily lead to dryness and cause some discomfort to the human body.

As can be seen from the situation described above, if you want to keep warm in winter, you must also control the indoor humidity. You can use a humidifier appropriately, or put a basin of water indoors when sleeping. Sprinkling some water on the ground is also very necessary, and be careful to drink more water.

Reference for the above content? Baidu Encyclopedia-Air Humidity