Hai'an Weather & Climate: Best Time to Visit
Average temperatures, rainfall, sunshine and the best time to visit Hai'an.
Climate overview of Hai'an
Hai'an, Jiangsu, China, experiences significant temperature variation throughout the year. Summers bring daytime highs of 33°C (91°F) in July, while winters cool to 8°C (46°F) in January.
With around 1254 mm (49 in) of annual rain/snowfall, Hai'an has a notably wet climate. However, this rain/snowfall is not evenly distributed, the city has a distinct rainy season from June to August, with very warm summers and cold winters. The wettest month is July.
Hai'an Weather by Month
Pick a month to see the average temperature, rainfall and sunshine in Hai'an - and find the best time to visit.
Monthly Temperature in Hai'an
Depending on the time of the year, temperatures range from very warm to chilly in Hai'an. 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 8°C (46°F).
At night, temperatures range from around 25°C (77°F) in July to 0°C (32°F) in January.
Check out our detailed temperature page for more information.
Temperature ranges by month
Rainfall in Hai'an
Hai'an has a relatively rain/snowy climate with high precipitation levels, averaging 1254 mm (49 in) of rain/snowfall annually. Hai'an can be quite wet during July, receiving approximately 226 mm (8.9 in) of precipitation over 13 rainy days.
In contrast, during the driest month (December), you will experience much drier conditions, with 38 mm (1.5 in) of precipitation spread across 9 rainy days. For more details, please visit our Hai'an Precipitation page.
The mean monthly precipitation over the year, including rain, hail, and snow
The average number of days each month with precipitation
Best Time to Visit Hai'an
Monthly ratings reflect general weather comfort, based on daytime temperature and rainfall. Swimming and winter conditions are highlighted separately where relevant.
- Best overall: April and October
- Warmest weather: July and August
- Wettest months: May, June, July and August, when rainfall is highest.
- Seasonal pattern: A distinct rainy season from June to August, with very warm summers and cold winters
- Coldest conditions: January, with freezing nights around 0°C (32°F).
Frequently asked questions about the climate in Hai'an
What is the best time to visit Hai'an?
April and October typically offer the most optimal weather in Hai'an. In contrast, January, July and August tend to have less optimal conditions. Hai'an has a distinct rainy season from June to August, with very warm summers and cold winters.
What temperatures can I expect in Hai'an?
Daytime highs range from 8°C (46°F) in January to 33°C (91°F) in July. Nighttime lows range from 0°C (32°F) to 25°C (77°F). Temperatures vary considerably through the year.
How much rain does Hai'an get?
Annual rainfall is around 1254 mm (49 in). July is the wettest month with 226 mm (8.9 in), while December is the driest with 38 mm (1.5 in).
Hai'an 3-Day Forecast
Hai'an on the map
Hai'an is highlighted - select any city to see its climate.
Popular this month
Where to go in August - average daytime high across popular destinations.
Hangzhou
34°C (93°F) Guangzhou34°C (93°F) Shanghai32°C (90°F) Xi'an
33°C (91°F) Beijing32°C (90°F) Shenzhen32°C (90°F) Chengdu31°C (88°F) Qingdao29°C (84°F) 
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