What time does the fog usually end at the top of Tianmen Mountain?

The fog at the top of Tianmen Mountain usually ends at 1 am. Fog started from eleven o'clock in the evening to around two o'clock in the morning, and it will disperse around ten o'clock the next morning. When the relative humidity reaches 1%, the water vapor in the air will condense into fine water droplets suspended in the air, which will reduce the visibility at the ground level. This weather phenomenon is called fog. Most of them appear between February and April in spring. Tianmenshan National Forest Park, located 8 kilometers south of Zhangjiajie City, is a mountain-type natural scenic spot. The park covers a total area of 96 square kilometers, with a peak area of 2 square kilometers and its main peak at an altitude of 1518.6 meters.