Nanjing has a humid climate in the north subtropical zone, with four distinct seasons and abundant rainfall. Annual average rainfall 1 17 days, average rainfall 1 106.5mm, relative humidity 76%, frost-free period 237 days. The rainy season is from late June to early July every year. In 20 10, the average annual rainfall in the urban area is1274.0mm, which is the same as normal. Other counties1212.1~1368.0mm, more than normal10% ~ 30%; Urban area 1302.0mm, 30% higher than normal. The annual precipitation days are 1 12 ~ 133 days. The annual average temperature 15.7 ~ 16.8℃ is 0.4 ~ 0.9℃ higher than normal. The average temperature in the urban area in 20 10 is 16.2℃. In winter, the northeast wind predominates throughout the year, and the average minimum temperature in 10 is 65438 0.6℃. Southeast winds predominate in summer, with an average maximum temperature of 30.6℃ in July. The extreme maximum temperature in Nanjing history was 43℃, which appeared in July of 1934 and 13. The lowest temperature is 14.0℃, appearing at 1955 1.6. 20 10, the highest temperature is only 38.4℃, and the lowest temperature is 5.5℃. Climatology in China adopts that the average temperature for five consecutive days in summer is > 22℃, in winter 10℃ and < 22℃. Nanjing entered the spring around April 1, and it was already green and pink before Qingming. Entering summer is around June 8, when the wheat is mature and the grain is vigorous; Autumn is about September 18; Winter is about165438+1October 12. beginning of winter has passed, but the vegetation is not withered. Nanjing is long in winter and summer, but slightly shorter in spring and autumn.