Blessed with a northern subtropical monsoon climate, Nanjing has four distinct seasons, synchronized rainfall and heat, hot and rainy summers, as well as cold and dry winters. It has an annual average temperature of around 16.4℃, moderate humidity and an annual average relative humidity of 73%. Precipitation is concentrated in summer due to the influence of the plum rain and typhoons. The average temperature in Nanjing in September is approximately 23.1℃ to 24.1℃.