Haimen Weather & Climate: Best Time to Visit

Depending on the time of the year, temperatures range from very warm to chilly in Haimen. Average daytime temperatures reach a very warm 33°C (91°F) in July. In January, the coolest month of the year, temperatures drop to a chilly 9°C (48°F).

At night, temperatures range from around 26°C (79°F) in July to 2°C (36°F) in January.

Check out our detailed temperature page for more information.

Temperature ranges by month

Haimen has a relatively rain/snowy climate with high precipitation levels, averaging 1296 mm (51 in) of rain/snowfall annually. Haimen can be quite wet during June, receiving approximately 244 mm (9.6 in) of precipitation over 14 rainy days.

In contrast, during the driest month (December), you will experience much drier conditions, with 41 mm (1.6 in) of precipitation spread across 10 rainy days days. For more details, please visit our Haimen Precipitation page.

The mean monthly precipitation over the year, including rain, hail, and snow

The average number of days each month with precipitation

Haimen can be enjoyed more throughout the sunniest month of August under a blue sky, with approximately 8.2 hours of sunshine daily. In contrast, the city experiences much darker days in February, with only 4.0 hours of sunlight per day.

Visit our detailed sunshine hours page for more information.

Monthly hours of sunshine

Daily hours of sunshine

The relative humidity is high throughout the year in Haimen.

The city experiences its highest humidity in June, reaching 79%. In February, the humidity drops to its lowest level at 74%. What does this mean? Read our detailed page on humidity levels for further details.

Relative humidity over the year