Tianjin falls within the temperate zone, and, being a port city in northern China, it is frequently affected by tidal air currents. The annual average temperature here is about 13 degrees C. July is the hottest month, with the temperature above 26 degrees C., while January is the coldest, when below freezing temperatures can be expected. The annual precipitation of the city is not much, although occasionally plagued by monsoon weather in summer time. Despite the fact that there are cloudless skies almost two-fifths of the year here, it is suggested that travelers visit Tianjin either in spring or in autumn, when it is neither to hot nor too cold.