Tianjin has a warm and semi-humid continental monsoon climate with an average annual temperature of 12.3 degrees Centigrade. The average temperature of July, the hottest month of the year, reaches 26 degrees Centigrade; the average temperature of January, the coldest of the year, reaches 4 degrees below zero. The average annual rainfall of Tianjin is 550-680 millimeters and the rainfall in summer makes up 80 percent of the total of the year.