Changsha is controlled by the tropical monsoon climate, being humid and temperate and having obvious seasonal changes and experiencing hot summer and cold winter. The four seasons have a clear distinction. Spring and autumn are short instead of summer and winter being long. Changsha is far away from sea and is in alluvial basin, and has a high and steep edge zone, which tilts northward. As a result, the cold air from the north can accumulate deeply, and winter in Changsha is colder than other areas of the same latitude and summer is hotter than other areas of the same latitude. The average temperature in Changsha is 17.2℃, and the coldest time is in January and the average temperature is 4.7℃, and the hottest time is in July and the average temperature is 29.4℃. The rainfall in Changsha is uneven, and spring is more and summer and autumn are less.

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