Climate
Wuxi City has a northern subtropical humid monsoon climate, characterized by distinct four seasons, abundant heat and precipitation, and the same seasons of rain and heat. Summer is dominated by the oceanic summer monsoon, with prevailing southeasterly winds and hot and rainy weather. Winter is dominated by the continental winter monsoon, with mostly northerly winds. Spring and autumn are the transition periods between the winter and summer monsoons, with changeable weather in spring and clear, cool autumn. The average annual temperature (1981-2010) is 16.2°C, with 1121.7 mm of precipitation, 123 rainy days, 1924.3 hours of sunshine, and a sunshine percentage of 43%. July is the hottest month of the year, and January is the coldest.
In 2020, Wuxi City experienced abnormally high temperatures, abundant precipitation, and normal sunshine. Temperatures remained elevated throughout winter and spring, with the winter being the warmest since meteorological records began in 1955 and the spring being the second warmest on record for the same period, second only to 2018. Summer precipitation was abnormally high, only less than that in 1999 and 1991, ranking third highest in the same period in history. In particular, there was an extremely long plum rain season, with the amount of plum rain reaching 3.1 times the annual average, ranking second highest in history after 1991. Severe floods and waterlogging disasters occurred; high temperatures persisted for a long time in August; and the impact of typhoons was light.