Hoi An
September
Weather in Hoi An for September 2025
Your guide to Hoi An weather in September - trends and predictions
Until now, September 2025 in Hoi An is slightly cooler than the historical average by -1.1 °C.
Expect cooler weather in the next days in Hoi An with the forecast suggesting a temperature of 28.5 °C, lower than the historical average.
In general, the average temperature in Hoi An at the beginning of September is 30.9 °C. As the month progressed, temperatures tended to noticeably cool down, reaching an average of 28.6 °C by the end of September.
Hoi An experiences heavy rainfall in September, with over 20 rainy days and an average total precipitation 434.7 mm.
Temperatures
Rain 🌧️
0
Dry days
30
Rainy days
0
Snow days
30°/24°
Temperatures
15 km/h
Avg max wind
81 %
Avg humidity
Hoi An Weather September
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Temperatures trend during September in Hoi An
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September weather in Hoi An day by day
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| Date | Weather | Temperatures | Rain | UV | More |
|---|---|---|---|---|---|
| 1 Sept. |  Moderate or heavy rain shower | 31° /24° | 4.1 mm | 7 | |
| 2 Sept. |  Patchy rain possible | 31° /24° | 3.3 mm | 7 | |
| 3 Sept. | Patchy rain possible | 31° /24° | 3.8 mm | 7 | |
| 4 Sept. | Moderate or heavy rain shower | 31° /24° | 10.5 mm | 7 | |
| 5 Sept. | Patchy rain possible | 31° /24° | 5.9 mm | 7 | |
| 6 Sept. | Patchy rain possible | 31° /25° | 9.1 mm | 7 | |
| 7 Sept. | Moderate or heavy rain shower | 30° /24° | 15.2 mm | 7 | |
| 8 Sept. | Moderate or heavy rain shower | 31° /24° | 5.7 mm | 7 | |
| 9 Sept. | Moderate or heavy rain shower | 31° /24° | 7 mm | 7 | |
| 10 Sept. | Light rain shower | 30° /24° | 11.6 mm | 6 | |
| 11 Sept. | Patchy rain possible | 30° /24° | 24.2 mm | 7 | |
| 12 Sept. | Moderate or heavy rain shower | 30° /24° | 40.6 mm | 7 | |
| 13 Sept. | Patchy rain possible | 31° /24° | 10 mm | 7 | |
| 14 Sept. | Light rain shower | 30° /24° | 7 mm | 7 | |
| 15 Sept. | Patchy rain possible | 31° /24° | 4.8 mm | 7 | |
| 16 Sept. | Patchy rain possible | 30° /24° | 0.9 mm | 2.9 | |
| 17 Sept. |  Moderate rain | 28° /25° | 8.9 mm | 2.9 | |
| 18 Sept. | Moderate rain | 29° /24° | 8.2 mm | 2.5 | |
| 19 Sept. | Moderate rain | 29° /24° | 10.9 mm | 3.3 | |
| 20 Sept. | Patchy rain possible | 29° /25° | 4 mm | 6 | |
| 21 Sept. | Patchy rain possible | 30° /25° | 3.5 mm | 6 | |
| 22 Sept. | Patchy rain possible | 27° /25° | 2.8 mm | 6 | |
| 23 Sept. | Patchy rain possible | 30° /25° | 0.7 mm | 6 | |
| 24 Sept. | Patchy rain possible | 30° /24° | 2.7 mm | 6 | |
| 25 Sept. | Patchy rain possible | 29° /25° | 2.3 mm | 6 | |
| 26 Sept. | Patchy rain possible | 30° /25° | 4.2 mm | 6 | |
| 27 Sept. | Patchy rain possible | 27° /24° | 2.8 mm | 6 | |
| 28 Sept. |  Heavy rain | 23° /22° | 42.3 mm | 5 | |
| 29 Sept. | Patchy rain possible | 30° /24° | 4.7 mm | 7 | |
| 30 Sept. |  Sunny | 31° /24° | 4.1 mm | 7 | |
| Next | |||||
Important Notice
Our weather forecast for Hoi An 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 Hoi An forecast closer to your planned date for the most up-to-date weather information.
Change Month
Hoi An in September - FAQ
What are the expected maximum and minimum temperatures in Hoi An during September?
During September, expect a variety of temperatures with highs around 30° and lows near 24°, suitable for diverse activities and preferences.
How much rainfall should be expected in Hoi An during September?
Significant rainfall exceeding 434.7 mm is expected in Hoi An during September, occurring over more than 30 days. Preparing for wet conditions is recommended in your planning.
What are the typical wind conditions in Hoi An during September?
The average wind speed in Hoi An during September is 15 km/h, suggesting breezy to windy conditions, depending on your activities.
September rainfall patterns in Hoi An
Explore the daily rainfall trends and prepare for Hoi Ans September weather 💧
UV exposure in Hoi An during September
Stay informed about UV levels for safe outdoor activities throughout the month of September ☀️
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