Chongqing belongs to sub-tropical monsoon climate. The features are warm winter, hot summer, early spring and short autumn. Annual average temperature is around 19.2 centigrade degree. The average lowest temperature is 6-8 centigrade degree in winter. The average highest temperature is 27-38 centigrade degree in summer and the extreme temperature can reach as high as 43.8 centigrade degree. Hence it had got the name of 'furnace city'.

The monsoon concentrates in summertime. The annual average rainfall is 1000-1100mm. There is plenty of night rain in summer, hence the saying 'Ba mountains' night rain'. 

Chongqing is also called 'foggy city'. There is much fog from the end of autumn to early spring with at least 68 foggy days a year. Chongqing is also one of the cities with shortest sunshine time in China. The annual sunshine time is 941.9 hours.