Weather in Sanya for September 2025
Expect cooler weather in first days of September 2025 in Sanya with the forecast suggesting a temperature of 29.9 °C, lower than the historical average.
In general, the average temperature in Sanya at the beginning of September is 30.7 °C. As the month progressed, temperatures tended to moderately fall, reaching an average of 29.1 °C by the end of September.
Sanya experiences heavy rainfall in September, with over 20 rainy days and an average total precipitation 404.7 mm.
Is September a good time to visit Sanya? check out the best time to travel to Sanya page.
New! Chat with our AI weatherman - it’s amazing and free.
Temperatures
Rain 🌧️
More
Sanya Weather September
Temperatures trend during September in Sanya
September weather in Sanya day by day
| Date | Weather | Temperatures | Rain | UV | More |
|---|---|---|---|---|---|
| 1 Sept. |  Patchy rain possible | 31° /26° | 0.1 mm | 6 | |
| 2 Sept. | Patchy rain possible | 31° /26° | 0.5 mm | 6 | |
| 3 Sept. |  Moderate rain at times | 31° /25° | 3.1 mm | 7 | |
| 4 Sept. | Patchy rain possible | 32° /25° | 0.8 mm | 7 | |
| 5 Sept. |  Heavy rain at times | 33° /25° | 2.5 mm | 7 | |
| 6 Sept. | Moderate or heavy rain shower | 28° /26° | 51.5 mm | 6 | |
| 7 Sept. | Moderate or heavy rain shower | 29° /26° | 58.2 mm | 6 | |
| 8 Sept. |  Overcast | 31° /26° | 0 mm | 7 | |
| 9 Sept. | Patchy rain possible | 31° /26° | 1.8 mm | 7 | |
| 10 Sept. | Moderate or heavy rain shower | 27° /24° | 11 mm | 6 | |
| 11 Sept. | Moderate or heavy rain shower | 29° /25° | 22.7 mm | 6 | |
| 12 Sept. | Patchy rain possible | 30° /24° | 5.9 mm | 7 | |
| 13 Sept. | Moderate or heavy rain shower | 30° /25° | 5.1 mm | 7 | |
| 14 Sept. | Patchy rain possible | 29° /25° | 1.9 mm | 6 | |
| 15 Sept. | Patchy rain possible | 30° /24° | 1.7 mm | 6 | |
| 16 Sept. | Moderate or heavy rain shower | 29° /24° | 8.4 mm | 6 | |
| 17 Sept. | Moderate rain at times | 30° /24° | 3.2 mm | 7 | |
| 18 Sept. | Patchy rain possible | 32° /24° | 4 mm | 7 | |
| 19 Sept. | Moderate or heavy rain shower | 27° /24° | 73.6 mm | 6 | |
| 20 Sept. | Heavy rain at times | 30° /24° | 6.3 mm | 7 | |
| 21 Sept. | Patchy rain possible | 31° /25° | 5.6 mm | 7 | |
| 22 Sept. | Moderate or heavy rain shower | 28° /24° | 24.7 mm | 6 | |
| 23 Sept. | Moderate or heavy rain shower | 25° /23° | 85.3 mm | 6 | |
| 24 Sept. | Moderate or heavy rain shower | 27° /25° | 18.2 mm | 6 | |
| 25 Sept. |  Cloudy | 29° /24° | 0 mm | 6 | |
| 26 Sept. |  Sunny | 29° /24° | 0 mm | 7 | |
| 27 Sept. | Sunny | 29° /24° | 0 mm | 7 | |
| 28 Sept. | Overcast | 30° /25° | 0 mm | 7 | |
| 29 Sept. | Patchy rain possible | 30° /25° | 0.4 mm | 7 | |
| 30 Sept. | Patchy rain possible | 30° /25° | 0.1 mm | 7 | |
| Next | |||||
Sanya in September - FAQ
What to pack to Sanya in September?
As you prepare for your trip to Sanya in September, it's important to consider the typical weather patterns for the time of year. Below is a carefully tailored packing list to ensure that your time in Sanya, during September, is comfortable and enjoyable, regardless of the weather conditions.
- Clothing
- Lightweight Clothing: T-shirts, blouses, shorts, skirts
- Rain Gear: Lightweight, waterproof clothing
- Footwear
- Waterproof Shoes
- Sandals/Flip-flops: Comfortable for warm climates
- Accessories
- Sunglasses: For sun protection
- Sun Hats: Wide-brimmed hats for sun protection in warm weather
- Umbrellas/Raincoats: For rainy days
- Personal Items
- Sunscreen: High SPF for sunny destinations
- Lip Balm with SPF: To protect against chapped lips
- Insect Repellent: For destinations with mosquitos or other insects
September rainfall patterns in Sanya
UV exposure in Sanya during September
Quick links
Where is Sanya?Get accurate weather forecasts for Sanya, located at latitude 18.243 and longitude 109.505. Stay updated with localized weather information tailored for Sanya.