Hainan (Hainan Dao)
September
Weather in Hainan for September 2027
Your guide to Hainan weather in September - trends and predictions
In general, the average temperature in Hainan at the beginning of September is 29.6 °C. As the month progressed, temperatures tended to slightly decrease, reaching an average of 29.3 °C by the end of September.
Hainan experiences heavy rainfall in September, with over 20 rainy days and an average total precipitation 394.6 mm.
Is September a good time to visit Hainan? check out the best time to travel to Hainan page.
✨ Is September a good time to visit Hainan? – Ask the AI Weatherman
Temperatures
Rain 🌧️
More
4
Dry days
26
Rainy days
0
Snow days
29°/23°
Temperatures
13 km/h
Avg max wind
88 %
Avg humidity
Hainan Weather September
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What’s the Weather Like in Hainan This September?
Discover the average temperatures and weather trends across Hainan’s cities this September.
Temperatures trend during September in Hainan
See the weather trend as well as the moving average line
September weather in Hainan day by day
Click on a date for more information
| Date | Weather | Temperatures | Rain | UV | More |
|---|---|---|---|---|---|
| 1 Sept. |  Moderate rain | 29° /23° | 22.2 mm | 5 | |
| 2 Sept. |  Moderate or heavy rain with thunder | 30° /23° | 8.1 mm | 8 | |
| 3 Sept. |  Light rain | 30° /23° | 3.7 mm | 9 | |
| 4 Sept. | Light rain | 31° /23° | 3.2 mm | 8 | |
| 5 Sept. | Light rain | 30° /23° | 9.1 mm | 7 | |
| 6 Sept. |  Patchy light rain with thunder | 29° /23° | 20.1 mm | 6 | |
| 7 Sept. |  Heavy rain | 28° /23° | 63.8 mm | 5 | |
| 8 Sept. | Patchy light rain with thunder | 29° /23° | 8.1 mm | 6 | |
| 9 Sept. | Moderate rain | 30° /23° | 15.8 mm | 6 | |
| 10 Sept. | Light rain | 28° /22° | 8.5 mm | 5 | |
| 11 Sept. | Light rain | 27° /22° | 8.7 mm | 5 | |
| 12 Sept. | Moderate rain | 28° /22° | 23.9 mm | 5 | |
| 13 Sept. | Patchy light rain with thunder | 28° /22° | 25.6 mm | 5 | |
| 14 Sept. | Heavy rain | 28° /22° | 25.3 mm | 5 | |
| 15 Sept. | Light rain | 30° /23° | 5.9 mm | 5 | |
| 16 Sept. | Patchy light rain with thunder | 29° /23° | 11.9 mm | 5 | |
| 17 Sept. | Light rain | 30° /23° | 7.1 mm | 5 | |
| 18 Sept. | Light rain | 29° /23° | 5.4 mm | 5 | |
| 19 Sept. | Light rain | 28° /23° | 8.6 mm | 5 | |
| 20 Sept. |  Moderate or heavy rain shower | 30° /23° | 7.9 mm | 8 | |
| 21 Sept. | Light rain | 31° /23° | 6 mm | 7 | |
| 22 Sept. | Moderate rain | 28° /23° | 14.8 mm | 6 | |
| 23 Sept. | Light rain | 28° /22° | 2.6 mm | 5 | |
| 24 Sept. | Moderate rain | 26° /22° | 21.9 mm | 4 | |
| 25 Sept. | Moderate rain | 28° /22° | 22.6 mm | 6 | |
| 26 Sept. | Light rain | 29° /23° | 9.4 mm | 6 | |
| 27 Sept. | Light rain | 30° /23° | 4.9 mm | 6 | |
| 28 Sept. | Moderate rain | 30° /23° | 14.9 mm | 7 | |
| 29 Sept. |  Light rain shower | 31° /24° | 2 mm | 8 | |
| 30 Sept. | Light rain | 31° /23° | 2.6 mm | 8 | |
| 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.
Change Month
Hainan weather in September vs August vs October
Compare September weather in Hainan with the previous and following months. See how temperature, rainfall, wind, and other conditions change throughout the year to help you plan your visit.
| August | September | October | |
|---|---|---|---|
| Weather | Patchy rain possible | Patchy rain possible | Patchy rain possible |
| Temperatures | 32°/24° | 29°/23° | 27°/21° |
| Rainfall | 309 mm | 395 mm | 335 mm |
| Wind | 12.2 km/h | 13.3 km/h | 16 km/h |
| Humidity | 81% | 88% | 87% |
| Rainy days | 25 days | 26 days | 22 days |
| Dry days | 6 days | 4 days | 9 days |
Planning a trip to Hainan? Discover the best time to visit
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 29° and lows near 23°, suitable for diverse activities and preferences.
How much rainfall should be expected in Hainan during September?
Significant rainfall exceeding 394.6 mm is expected in Hainan during September, occurring over more than 26 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 13 km/h, suggesting breezy to windy conditions, depending on your activities.
September rainfall patterns in Hainan
Explore the daily rainfall trends and prepare for Hainans September weather 💧
Typically, Hainan has 26 rainy days in September with a total of 394.6 mm of rainfall.
UV exposure in Hainan during September
Stay informed about UV levels for safe outdoor activities throughout the month of September ☀️
What to pack to Hainan in September?
Warm & sunny · highs around 29 °C, frequent showers
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.
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