Rugao is subtropical. It is a part of the East Asian monsoon region. Under the influence of solar radiation and monsoon circulation, a subtropical monsoon climate with four distinct seasons is formed, with low temperature and little rain in winter, high temperature and rainy in summer. Because it is close to the sea, it is obviously regulated by the ocean, and the daily range is smaller than that of annual range. The offshore location makes Rugao deeply influenced by the summer monsoon, rich in water vapor and precipitation, and the annual rainfall is above1000 mm. Precipitation is mainly concentrated in summer, but the intensity of summer monsoon varies from year to year, so the annual precipitation changes greatly. The annual average total solar radiation in the city is 476,090 Joules/cm2, and the annual average wind speed is 3.3m/s. ..
Rugao is located in the Yangtze River Delta, with dense river networks and numerous lakes. The density of river network is as high as 4 kilometers per square kilometer, and the water towns in the city are between the Yangtze River systems.