Located in the warm temperatezone, Tianjin has sub-humidcontinental monsoon climate.As it is influenced by the seaand ocean in summer and bythe continent in winter, thefour seasons here are clear cut,which results in a great varietyof temperature throughout the year. The average temperaturein a year is 11.1–12.0 . The coldest month is January, with anaverage temperature of less than -4 ; the hottest month is July,with an average temperature of about 26 . On average, thefrost-free period lasts about 200 days. The annual precipitationis between 550 and 680 mm, 75% of which occurs in June, Julyand August. The sunshine time in the city is relatively long: 1,921.0–2,852.0 hours per year. The average wind speed throughout theyear is 2.5 m/s.