Click on a day for an hourly weather forecast
The weather in Sanya in September is very hot. The average temperatures are between 24°C and 31°C, drinking water regularly is advisable.
You can expect rain for roughly half of the month of September in Sanya. We’re expecting roughly 8 to 15 days of rain, so your rubber boots and umbrella are going to see plenty of use this month if you’re keen on staying dry.
Our weather forecast can give you a great sense of what weather to expect in Sanya in September 2025.
If you’re planning to visit Sanya in the near future, we highly recommend that you review the 14 day weather forecast for Sanya before you arrive.
| Month | Temperatures | Rainy Days | Dry Days | Snowy Days | Rainfall | Weather | More details |
|---|---|---|---|---|---|---|---|
| January | 22° / 15° | 5 | 26 | 0 | 48 mm | Good | Sanya in January |
| February | 26° / 17° | 3 | 26 | 0 | 33 mm | Perfect | Sanya in February |
| March | 30° / 20° | 6 | 25 | 0 | 77 mm | Good | Sanya in March |
| April | 32° / 22° | 12 | 18 | 0 | 178 mm | Ok | Sanya in April |
| May | 33° / 24° | 17 | 14 | 0 | 266 mm | Ok | Sanya in May |
| June | 34° / 25° | 16 | 14 | 0 | 214 mm | Bad | Sanya in June |
| July | 33° / 24° | 16 | 15 | 0 | 237 mm | Ok | Sanya in July |
| August | 32° / 24° | 17 | 14 | 0 | 334 mm | Ok | Sanya in August |
| September | 31° / 24° | 14 | 16 | 0 | 248 mm | Ok | Sanya in September |
| October | 28° / 21° | 10 | 21 | 0 | 225 mm | Good | Sanya in October |
| November | 26° / 19° | 6 | 24 | 0 | 98 mm | Perfect | Sanya in November |
| December | 23° / 16° | 4 | 27 | 0 | 54 mm | Perfect | Sanya in December |