The clim ate in Chengde has a transitional character that is from cold temperate zone to warm temperate zone, from semiarid to semi-moist. It belongs to continental monsoon Yanshan mountainous region climate. It has distinct four seasons and the temperature is distinct especially between day and night. The sunshine here is ample. It is cool in summer and cold in winter. The average temperature is 8.9℃ in a year, the average amount of rain is 400-800mm, the average number of no frost days in a year is 73-170 days. January is the coldest month of the year, the average month temperature is 9.4℃ below zero. The hottest month is July. The annual amount of rain declines gradually from the north to the south. There is little rain and snow in winter and spring. The amount of rain and snow in winter accounts to 1 to 3%, in spring 1 to 13%, in autumn 14 to 19%, in summer 65 to 73%. Because it is monsoon climate in Chengde, the direction of wind changes according to the season. There are 2576-3000 sunshine hours in a year and the annual percent rate of sunshine is 60 to 66%. In May the sunshine hours are the longest, however in November and December they are the shortest.