In Tianjin (or Tientsin), a metropolis located southeast of Beijing (compared to which it has a similar but slightly milder climate), on the Bohai Sea coast, the climate is continental, with cold but sunny winters, and hot, sultry and rainy summers. Like many areas of China, the city is affected by the monsoon circulation: in winter the northwest cold currents will prevail, while in summer they will be replaced by hot and humid currents of tropical origin. Spring and autumn are transitional periods.
Here are the average temperatures.
Tianjin - Average temperatures
MonthJanFebMarAprMayJunJulAugSepOctNovDec
Min (°C)-7-429152023221791-5
Max (°C)261221263031302720114
Min (°F)192536485968737263483423
Max (°F)364354707986888681685239

Precipitation amounts to 510 mm (20 inches) per year: the rains are not abundant, but are concentrated in the summer months. Here is the average precipitation.
Tianjin - Average precipitation
MonthJanFebMarAprMayJunJulAugSepOctNovDecYear
Prec.(mm)2482235801501254525113512
Prec.(in)0.10.20.30.91.43.15.94.91.810.40.120.2
Days223468119653261

In winter, the average temperature is around or below freezing (0 °C or 32 °F); sunshine is quite common, and a cold wind blows from the deserts of Mongolia. On colder periods, the temperature remains below freezing during the day as well, and at night it can drop to -15 °C (5 °F). Although the winter is a dry season, sometimes it can snow.
In winter and especially in spring (March to May), the city can be affected by the yellow dust, coming from the deserts of Mongolia and Central Asia, which forms a characteristic haze and brings breathing problems and eye irritation. On the other hand, when the wind is weak and the air is stagnant (a situation that occurs more easily in winter, while in summer the heat causes rising currents, besides it can rain), the city can be hit by smog.

In spring, the temperature increases rapidly, so much so that already in April it often exceeds 20 °C (68 °F), and in May the average maximum around 26 °C (79 °F) confirms the precocity of the warm weather.

In June, it's already hot as in the middle of summer, then in July and August the maximum temperature does not increase any more because around mid-June the summer monsoon arrives, bringing rains, sometimes heavy, and high humidity. So, in Tianjin summer is hot, but especially muggy. July and August are the rainiest month. Anyway, even in summer there may be entire weeks without rain, and these periods are usually the hottest ones, with highs about 35 °C (95 °F), and the perceived temperature even exceeding 40 °C (104 °F) because of the humidity. In the neighborhoods closest to the sea, however, the breeze tempers the heat a bit. The monsoon is quite irregular, here as well as in the north-eastern part of China, so the rains may be more or less abundant depending on the year.

In autumn, the weather improves, rainfall decreases, and by October the rains are quite rare. By September, the humidity decreases and the weather becomes pleasant, while in October the nights begin to be very cool.

Tianjin

The sun in Tianjin shines quite often all year round, for a total of 2,375 hours. The least sunny months, at least in comparison to the length of the days, are July and August.
Tianjin - Sunshine
MonthJanFebMarAprMayJunJulAugSepOctNovDec
Hours567788777655

Near Tianjin, the sea is very cold in winter, but it warms up a lot in summer, reaching 25 °C (77 °F) in August.
Tianjin - Sea temperature
MonthJanFebMarAprMayJunJulAugSepOctNovDec
Temp (°C)4347121823252319148
Temp (°F)393739455464737773665746

From July to early October (and occasionally also in the second half of June), Tianjin can be affected by typhoons, the tropical cyclones of South-East Asia, although this area of China is less exposed than the south.

When to go


The best times to visit Tianjin are spring and autumn in order to avoid both the cold in winter and the heat and the rains in summer, and in particular from mid-April to mid-May and from mid-September to mid-October.