Hainan Weather & Climate: Best Time to Visit
Average temperatures, rainfall, sunshine and the best time to visit Hainan.
Climate overview of Hainan
The temperature in Hainan, China, can vary quite a bit throughout the year, with conditions ranging from pleasant in the warmest months to cool during the cooler months. Rainfall levels are neither high nor low, falling within a moderate range. Hainan is China’s southernmost province, known for its tropical beaches, coconut palms, and resort cities like Sanya. This makes it a popular getaway for sun-seekers. Let's now guide you through the climate details for a complete overview.
Hainan Weather by Month
Pick a month to see the average temperature, rainfall and sunshine in Hainan - and find the best time to visit.
Monthly Temperature in Hainan
Visitors to Hainan can expect significant temperature changes throughout the year. Average maximum daytime temperatures range from a pleasant 21°C (70°F) in July, the warmest time of the year, to a very cold 0°C (32°F) during cooler months like January.
At night, you can expect temperatures ranging from 11°C (52°F) in July to around -14°C (7°F) during January.
Check out our detailed temperature page for more information.
Temperature ranges by month
Rainfall in Hainan
Generally, Hainan experiences moderate precipitation patterns, averaging 507 mm (20 in) yearly. Significant seasonal changes in precipitation occur throughout the year. In the wettest month, July it receives high rainfall, averaging 111 mm (4.4 in) of precipitation, recorded across 16 rainy days. In contrast, the driest month December brings less snowfall, with 3.8 mm (0.1 in) over a single snowy day. For more details, please visit our Hainan 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 Hainan
Monthly ratings reflect general weather comfort, based on daytime temperature and rainfall. Swimming and winter conditions are highlighted separately where relevant.
- Best overall: June, July and August
- Warmest weather: July and August
- Fewest rainy days: January, February, November and December
- Wettest months: May, June, July, August and September, when rainfall is highest.
- Seasonal pattern: A distinct dry season from October to April, with pleasant summers and very cold winters
- Coldest conditions: January, with freezing nights around -14°C (7°F).
Frequently asked questions about the climate in Hainan
What is the best time to visit Hainan?
June, July and August typically offer the most optimal weather in Hainan. In contrast, January, February and December tend to have less optimal conditions. Hainan has a distinct dry season from October to April, with pleasant summers and very cold winters.
What temperatures can I expect in Hainan?
Daytime highs range from 0°C (32°F) in January to 21°C (70°F) in July. Nighttime lows range from -14°C (7°F) to 11°C (52°F). Temperatures vary considerably through the year.
How much rain does Hainan get?
Annual rainfall is around 507 mm (20 in). July is the wettest month with 111 mm (4.4 in), while December is the driest with 3.8 mm (0.1 in).
Hainan 3-Day Forecast
Hainan on the map
Hainan 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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