Hangzhou is located in the middle and lower reaches of the Yangtze River in eastern China and northern region of Zhejiang Province. Hangzhou has a subtropical monsoon climate with four distinct seasons. The summer is extremely hot and lasts long, with an average temperature of 25-32 degree Celsius.  Winter is cold and dry, with less frost. The average temperature in the coldest months of the year is 2-8 degree Celsius.  At the beginning of summer, Hangzhou was affected by the East Asian monsoon and entered the rainy season. In August and September, typhoons occasionally affect the weather in the coastal areas of Zhejiang, but Hangzhou is an inland city, and usually it only appears strong wind and rain in these two months.