Hainan Weather in September

Average temperatures, rainfall, sunshine and the best places to visit in Hainan, China in September.

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Sanya Haikou Qionghai Wenchang

Considering a trip to Hainan, China this September and wondering about the expected weather conditions? Find all the crucial information you need right here, addressing your question:

What to Expect in Hainan in September

Hainan, China is a region in China. September in Hainan generally has very warm temperatures, with heavy precipitation.

Temperatures

You can expect very warm maximum daytime temperatures of around 30°C (86°F) and nighttime temperatures around 26°C (79°F) in Sanya. The temperatures cited for both day and night represent usual averages, but it's possible some days could be hotter. It's advisable to dress accordingly to handle the heat.

To learn more about the conditions in specific areas of Hainan, China, check out the map below.

Precipitation

In September, precipitation varies across different areas. From heavy rainfall in Lingao with an average of 227 mm (8.9 in) to heavy rainfall in Wanning with 296 mm (12 in).

Explore Hainan by month

Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec

Best Places to Visit in Hainan in September

Click on a destination dot for more details. Toggle the map to compare temperatures or precipitation across Hainan.

Conditions Temperatures Precipitation
perfect weather
pleasant
tolerable
unpleasant
poor

Perfect weather is subjective. On this map perfect weather has been defined with temperatures between 20°C (68°F) and 29°C (84°F) and not too much precipitation (less than 90 mm (3.5 in) a month).

Popular Destinations in Hainan

What is the weather like in September for some of the most popular destinations in Hainan, China?

Temperature range in Hainan (September)

Precipitation variation in Hainan (September)

Sanya

In September Sanya generally has very high temperatures with maximum daytime temperatures around 30°C (86°F), minimum nighttime temperatures around 26°C (79°F) and heavy monthly rainfall. So on average the conditions are poor that month.

« August
September
October »
August
September
October
Max temperature
31°C (88°F)
30°C (86°F)
29°C (84°F)
Min temperature
26°C (79°F)
26°C (79°F)
24°C (75°F)
Monthly rainfall
269 mm (11 in)
277 mm (11 in)
190 mm (7.5 in)
Monthly rainy days
17 days
18 days
14 days
Weather conditions
poor
poor
tolerable
Climate in Sanya →

Haikou

In September Haikou generally has very high temperatures with maximum daytime temperatures around 31°C (88°F), minimum nighttime temperatures around 26°C (79°F) and heavy monthly rainfall. So on average the conditions are poor that month.

« August
September
October »
August
September
October
Max temperature
32°C (90°F)
31°C (88°F)
29°C (84°F)
Min temperature
27°C (81°F)
26°C (79°F)
25°C (77°F)
Monthly sun hours
220 hours
192 hours
177 hours
Monthly rainfall
238 mm (9.4 in)
238 mm (9.4 in)
169 mm (6.7 in)
Monthly rainy days
18 days
17 days
15 days
Weather conditions
poor
poor
pleasant
Climate in Haikou →

Qionghai

In September Qionghai generally has very high temperatures with maximum daytime temperatures around 32°C (90°F), minimum nighttime temperatures around 25°C (77°F) and heavy monthly rainfall. So on average the conditions are poor that month.

« August
September
October »
August
September
October
Max temperature
33°C (91°F)
32°C (90°F)
30°C (86°F)
Min temperature
26°C (79°F)
25°C (77°F)
23°C (73°F)
Monthly rainfall
243 mm (9.6 in)
260 mm (10 in)
209 mm (8.2 in)
Monthly rainy days
19 days
19 days
17 days
Weather conditions
poor
poor
poor
Climate in Qionghai →

Wenchang

In September Wenchang generally has very high temperatures with maximum daytime temperatures around 32°C (90°F), minimum nighttime temperatures around 25°C (77°F) and heavy monthly rainfall. So on average the conditions are poor that month.

« August
September
October »
August
September
October
Max temperature
33°C (91°F)
32°C (90°F)
30°C (86°F)
Min temperature
26°C (79°F)
25°C (77°F)
24°C (75°F)
Monthly sun hours
220 hours
192 hours
177 hours
Monthly rainfall
280 mm (11 in)
267 mm (11 in)
180 mm (7.1 in)
Monthly rainy days
19 days
18 days
16 days
Weather conditions
poor
poor
tolerable
Climate in Wenchang →

Wanning

In September Wanning generally has very high temperatures with maximum daytime temperatures around 30°C (86°F), minimum nighttime temperatures around 26°C (79°F) and heavy monthly rainfall. So on average the conditions are poor that month.

« August
September
October »
August
September
October
Max temperature
31°C (88°F)
30°C (86°F)
29°C (84°F)
Min temperature
27°C (81°F)
26°C (79°F)
25°C (77°F)
Monthly rainfall
195 mm (7.7 in)
296 mm (12 in)
285 mm (11 in)
Monthly rainy days
19 days
19 days
16 days
Weather conditions
unpleasant
poor
poor
Climate in Wanning →

Is your destination not in the list? Have a look at all destinations in Hainan, in China.

In our records: China September extremes

Notable September records observed across cities in China in our climate database (1976 – 2026). Historic readings can vary in quality, so treat these as illustrative.

  • From our sources, the wettest September day in China brought 362 mm (14 in) in Guangzhou on September 6, 1992.

Popular cities in September

Day & night temperatures, rainfall and average weather in Hainan in September.

City Weather Day temp Night temp Rainfall
Sanya 30°C (86°F) 26°C (79°F) 277 mm (11 in)
Haikou 31°C (88°F) 26°C (79°F) 238 mm (9.4 in)
Qionghai 32°C (90°F) 25°C (77°F) 260 mm (10 in)
Wenchang 32°C (90°F) 25°C (77°F) 267 mm (11 in)
Wanning 30°C (86°F) 26°C (79°F) 296 mm (12 in)
Danzhou 32°C (90°F) 24°C (75°F) 228 mm (9 in)

Hainan weather in September: frequently asked questions

What is the weather like in Hainan, China in September?

In September, Hainan, China generally has poor weather conditions. Sanya sees daytime temperatures near 30°C (86°F), with nights cooling to roughly 26°C (79°F).

What is the average temperature in Hainan, China in September?

Daytime temperatures in Sanya peak at roughly 30°C (86°F) in September, dropping to about 26°C (79°F) overnight.

Does Hainan, China get a lot of rain in September?

Expect plenty of rainfall. Sanya records an average of 277 mm (11 in) in September, putting it among the wetter months for Hainan, China.

Is September a Good Time to Visit Hainan, China?

In our view, September might not be the best time to travel to Hainan, China with often poor weather in Sanya.

Generally speaking, the best visiting conditions can be found in January, February, March, April, November and December offering mostly perfect weather in Sanya. The weather in June, July, August and September, on the other hand, tends to be poor.

Interested in more climate information?

We have much more information about the climate in Hainan.

Weather and climate has detailed information for every country in the world. Are you going to China? Get detailed historical weather averages for many cities in China.

Not sure yet where to go? We now have a tool which recommends destinations that suit your ideal travel conditions. Find out where to go with our weather planner.

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