What does humidity mean in the weather forecast?

Weather forecast humidity refers to the degree of air humidity. General relative humidity. Relative humidity refers to the percentage of water vapor density actually contained in the air and saturated water vapor density at the same temperature.

Weather forecast is to predict the weather conditions in a certain period in the future by applying the law of atmospheric change and according to the current and recent weather situation. It is based on the analysis of satellite cloud images and weather maps, combined with the comprehensive study of meteorological data, terrain and seasonal characteristics, and mass experience. For example, the satellite cloud image of China Central Meteorological Observatory was taken by Fengyun-1 meteorological satellite made in China. Using satellite cloud images for analysis can improve the accuracy of weather forecast. The time limit of weather forecast is usually divided into three types: short-term weather forecast (2~3 days), medium-term weather forecast (4~9 days) and long-term weather forecast (10~ 15 days or more). CCTV mainly broadcasts short-term weather forecast every day.