Sanya weather in September
September is one of the least pleasant months in Sanya: highs of 29°C (85°F) and about 329 mm (13.0 in) of rain on average. Nights average 23°C (74°F) and cloud cover 75% (NASA POWER, 2001–2025 averages). The sea averages 30°C (86°F). It is the 2nd wettest month of the year and the 4th warmest. Compared with August, it is about as warm and about as wet; October brings highs of 28°C (82°F) and 408 mm (16.1 in) of rain.
Is September a good time to visit Sanya?
least pleasant month Weather score 35/100.
September is one of the least pleasant months for weather in Sanya. For better conditions, consider Dec–Apr.
Does it rain a lot in Sanya in September?
Yes, it is one of the rainy months: about 329 mm (13.0 in) falls in an average September. It is the 2nd wettest month of the year.
How warm is Sanya in September?
Days average 29°C (85°F) and nights 23°C (74°F).
Sanya weather by month
| Month | High | Low | Rain | Cloud | Sea | Weather |
|---|---|---|---|---|---|---|
| January | 24°C (75°F) | 14°C (58°F) | 21 mm | 63% | 24°C (75°F) | best |
| February | 26°C (79°F) | 16°C (60°F) | 15 mm | 59% | 24°C (76°F) | best |
| March | 28°C (83°F) | 18°C (65°F) | 36 mm | 59% | 26°C (78°F) | best |
| April | 31°C (87°F) | 21°C (70°F) | 81 mm | 59% | 28°C (82°F) | best |
| May | 31°C (87°F) | 24°C (74°F) | 145 mm | 67% | 30°C (86°F) | fair |
| June | 30°C (85°F) | 25°C (76°F) | 191 mm | 79% | 31°C (88°F) | fair |
| July | 29°C (84°F) | 24°C (76°F) | 266 mm | 75% | 30°C (85°F) | least pleasant |
| August | 29°C (84°F) | 24°C (75°F) | 287 mm | 77% | 30°C (86°F) | least pleasant |
| September | 29°C (85°F) | 23°C (74°F) | 329 mm | 75% | 30°C (86°F) | least pleasant |
| October | 28°C (82°F) | 21°C (70°F) | 408 mm | 63% | 29°C (84°F) | least pleasant |
| November | 26°C (79°F) | 19°C (65°F) | 110 mm | 60% | 27°C (80°F) | fair |
| December | 24°C (75°F) | 15°C (60°F) | 41 mm | 63% | 25°C (77°F) | best |
Sources: 2001–2025 monthly averages from NASA POWER (MERRA-2 reanalysis), sea temperature from Open-Meteo Marine. Page updated . How we rate months