Qingdao is located in the monsoon area of the nor them temperate zone and is under the influence of the ocean environment and current, therefore the climate has the typical features with moist air, rich rainfall, moderate temperature, distinct four seasons, which indicate the northern temperate monsoon climate with oceanic features. The temperature in spring goes up very slowly, lagging one month behind the land-locked area; the summer is damp and hot, but without unbearable heat; the fall has little rainfall and clear climate for most of the time; and it is windy and cold in the long winter. The average temperature within the city is 12.2℃. the hottest month throughout the year is August, with the average temperature of 25.1℃; the coldest month throughout the year is January, with the average temperature of -1.2℃. The average rainfall is 775.6 millimeters; the heavily foggy days account for 51.3 days and slightly foggy days account for 108.2 days per year.