Hainan (Hainan Dao)
September
Weather in Hainan for September 2025
Your guide to Hainan weather in September - trends and predictions
In general, the average temperature in Hainan at the beginning of September is 31.3 °C. As the month progressed, temperatures tended to moderately fall, reaching an average of 29.4 °C by the end of September.
Hainan experiences heavy rainfall in September, with over 20 rainy days and an average total precipitation 422.5 mm.
Is September a good time to visit Hainan? check out the best time to travel to Hainan page.
New! Chat with our AI weatherman - it’s amazing and free.
Temperatures
Rain 🌧️
More
1
Dry days
29
Rainy days
0
Snow days
30°/23°
Temperatures
15 km/h
Avg max wind
87 %
Avg humidity
Hainan in September average weather
Move between months or click on a day
| Mon. | Tue. | Wed. | Thu. | Fri. | Sat. | Sun. |
|---|---|---|---|---|---|---|
| 1  33° | 2 33° | 3  33° | 4 33° | 5 32° | 6  28° | 7  27° |
| 8 32° | 9 30° | 10 25° | 11  25° | 12 29° | 13 30° | 14 30° |
| 15 31° | 16 31° | 17 30° | 18 29° | 19 26° | 20 30° | 21 30° |
| 22 27° | 23 26° | 24 23° | 25 28° | 26 30° | 27 30° | 28 32° |
| 29 32° | 30 31° |
You can click on date
Access Hainan weather forecasts with a simple click. Select any date for comprehensive insights on temperature, rainfall, and wind conditions.
Temperatures trend during September in Hainan
See the weather trend as well as the moving average line
September weather day by day
Click on a date for more information
| Date | Weather | Temperatures | Rain | UV | More |
|---|---|---|---|---|---|
| 1 Sept. | Moderate or heavy rain with thunder | 33° /24° | 2.9 mm | 7 | |
| 2 Sept. | Moderate or heavy rain with thunder | 33° /24° | 16.7 mm | 7 | |
| 3 Sept. | Light rain shower | 33° /24° | 2.5 mm | 7 | |
| 4 Sept. | Patchy rain possible | 33° /24° | 0.7 mm | 7 | |
| 5 Sept. | Light rain shower | 32° /24° | 14.9 mm | 7 | |
| 6 Sept. | Patchy light rain with thunder | 28° /24° | 35.5 mm | 6 | |
| 7 Sept. | Moderate or heavy rain shower | 27° /24° | 158.2 mm | 6 | |
| 8 Sept. | Patchy light rain with thunder | 32° /24° | 1.4 mm | 7 | |
| 9 Sept. | Moderate or heavy rain shower | 30° /23° | 31.6 mm | 7 | |
| 10 Sept. | Light rain shower | 25° /23° | 18.4 mm | 6 | |
| 11 Sept. | Patchy light drizzle | 25° /23° | 0.7 mm | 6 | |
| 12 Sept. | Light rain shower | 29° /23° | 2.6 mm | 6 | |
| 13 Sept. | Patchy light rain with thunder | 30° /23° | 15 mm | 6 | |
| 14 Sept. | Patchy rain possible | 30° /23° | 0.9 mm | 7 | |
| 15 Sept. | Light rain shower | 31° /23° | 8.5 mm | 7 | |
| 16 Sept. | Patchy light rain with thunder | 31° /23° | 2.4 mm | 7 | |
| 17 Sept. | Light rain shower | 30° /23° | 3.8 mm | 7 | |
| 18 Sept. | Light rain shower | 29° /23° | 7.4 mm | 6 | |
| 19 Sept. | Light rain shower | 26° /23° | 10.5 mm | 6 | |
| 20 Sept. | Moderate or heavy rain shower | 30° /23° | 16 mm | 7 | |
| 21 Sept. | Light rain shower | 30° /23° | 6.8 mm | 7 | |
| 22 Sept. | Moderate or heavy rain shower | 27° /24° | 31 mm | 6 | |
| 23 Sept. | Light drizzle | 26° /22° | 2.4 mm | 6 | |
| 24 Sept. | Light rain shower | 23° /22° | 13.8 mm | 5 | |
| 25 Sept. | Light rain shower | 28° /22° | 1.8 mm | 6 | |
| 26 Sept. | Light rain shower | 30° /23° | 4.6 mm | 7 | |
| 27 Sept. | Light rain shower | 30° /23° | 0.9 mm | 7 | |
| 28 Sept. | Patchy rain possible | 32° /23° | 0.1 mm | 7 | |
| 29 Sept. | Light rain shower | 32° /24° | 5.3 mm | 7 | |
| 30 Sept. | Patchy light drizzle | 31° /23° | 5.1 mm | 7 | |
| Next | |||||
Important Notice
Our weather forecast for Hainan in September is based on the analysis of historical data rather than real-time forecast models. While this provides a general overview, weather conditions can change. We recommend that you check the Hainan forecast closer to your planned date for the most up-to-date weather information.
Hainan in September - FAQ
What are the expected maximum and minimum temperatures in Hainan during September?
During September, expect a variety of temperatures with highs around 30° and lows near 23°, suitable for diverse activities and preferences.
How much rainfall should be expected in Hainan during September?
Significant rainfall exceeding 422.5 mm is expected in Hainan during September, occurring over more than 29 days. Preparing for wet conditions is recommended in your planning.
What are the typical wind conditions in Hainan during September?
The average wind speed in Hainan during September is 15 km/h, suggesting breezy to windy conditions, depending on your activities.
What to pack to Hainan in September?
As you prepare for your trip to Hainan 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 Hainan, 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 Hainan
Explore the daily rainfall trends and prepare for Hainans September weather 💧
UV exposure in Hainan during September
Stay informed about UV levels for safe outdoor activities throughout the month of September ☀️
Top locations in Hainan
Select a location for an accurate weather forecast
More Locations Quick links
You are here
Where is Hainan?Get accurate weather forecasts for Hainan, located at latitude 19.2 and longitude 109.7. Stay updated with localized weather information tailored for Hainan.
Found a mistake?
We appreciate your attention to details. Tell us here.