Tianjin has a sub-humid continental monsoon climate. The four seasons are very distinct. In spring, it is dry, windy, with fluctuating temperatures. In summer, the subtropical high in the Northwest Pacific often brings southerly wind, as well as high temperatures and humidity, accompanied with rain. In autumn, the sky is usually clear, bright and sunny. In winter, controlled by the Mongolian cold front, Tianjin receives northwesterly winds, which brings cold and dry weather.

The annual precipitation is 566 mm, about 85 percent of which is concentrated in summer and autumn. The average annual sunshine duration is 2,471—2,769 hours. The average wind speed is 2.3 m/s. The average temperature in Tianjin is 11.4°C—12.9°C. In January, the coldest month, the average temperature is -5.4°C—-3.0°C, while in July, the hottest month, the average temperature is 25.9°C—26.7°C.

Spring, from March to May, is windy and rainless. Temperature changes constantly and will dramatically increase after April.

Summer, from June to August, is hot, humid and sunny. People often refer to Tianjin's muggy days as 'sauna day'.

Autumn, from September to November, is generally warm and comfortable yet at night it can be slightly cold.

Winter, from December to February, is chilly and dry. It could be snowy and temperatures can be as low as -10.0°C—-20.0°C during a windy day.