Why does the weather teacher in Enshi rain?

Enshi belongs to subtropical monsoon and monsoon humid climate. The general characteristics are: less cold in winter, no heat in summer, less fog, moist all year round, abundant precipitation, and the same period of rain and heat. However, due to the complex terrain and disparity in terrain, there are extremely obvious vertical regional differences in climate. Heat and temperature decrease with the elevation of the terrain. The annual average temperature is 65438 06.3℃ in low mountains, 65438 03.4℃ in high mountains and 7.8℃ in high mountains. The annual precipitation is1100-1300mm in the southeast, 1000- 1900mm in the northwest and1400-1600mm in the middle; The annual average sunshine time is low in mountain areas 1300 hours, in second mountain areas 1200- 1350 hours, and in mountain areas 1000- 1350 hours; Frost-free period: 238-348 days in low mountain, 237-264 days in second mountain and 0/70-233 days in high mountain; Relative humidity is 82% in mountainous areas, 85% in mountainous areas and 82% in mountainous areas.