The territory of the Huaihe River running through Huai'an North Jiangsu Irrigation Canal warm temperate and subtropical line is our dividing line, so Huaian has both north and south climate characteristics. In general, the area in south of the canal is the north subtropical humid monsoon climate, the area in the north is the northern temperate semi-humid monsoon climate. Affected by monsoon climate, the four seasons is distinct, rainfall concentrated, and adequate light.
The city's average annual temperature is 14.1 ℃ -14.8 ℃, the basic shape was high and low by Hongze lake water effects in the formation of a warm center Hongze Lake. Temperature distribution in July is the highest and lowest in January. In general, the city's frost-free period is about 210 to 225 days. It is longer in the south than in the north. Hongze County’s frost-free period is up to 236 days, affected by the Hongze Lake.
The average precipitation of the city is 906 mm ~ l007 mm. Distribution of precipitation is larger in the south than the north, east than the west. Significant changes in precipitation during the year; the precipitation is usually concentrated in summer.
The city's annual average wind speed is 2.9 m / s to 3.6 m / s, with easterly winds and southwest winds dominated.