Hanoi
September
Weather in Hanoi for September 2025
Your guide to Hanoi weather in September - trends and predictions
In general, the average temperature in Hanoi at the beginning of September is 33.7 °C. As the month progressed, temperatures tended to significantly cool down, reaching an average of 29.7 °C by the end of September.
Hanoi experiences an exceptionally high level of rainfall in September, with more than 24 rainy days on average.
Is September a good time to visit Hanoi? check out the best time to travel to Hanoi page.
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4
Dry days
26
Rainy days
0
Snow days
31°/24°
Temperatures
13 km/h
Avg max wind
81 %
Avg humidity
Hanoi in September average weather
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| Mon. | Tue. | Wed. | Thu. | Fri. | Sat. | Sun. |
|---|---|---|---|---|---|---|
| 1  34° | 2 35° | 3  33° | 4  31° | 5 35° | 6 36° | 7 32° |
| 8 31° | 9 31° | 10  29° | 11  29° | 12 30° | 13 29° | 14  28° |
| 15  32° | 16  31° | 17 31° | 18 30° | 19 33° | 20 30° | 21 33° |
| 22 30° | 23 31° | 24 29° | 25 28° | 26 29° | 27 28° | 28 31° |
| 29 31° | 30 32° |
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Temperatures trend during September in Hanoi
See the weather trend as well as the moving average line
September weather day by day
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| Date | Weather | Temperatures | Rain | UV | More |
|---|---|---|---|---|---|
| 1 Sept. | Partly cloudy | 34° /25° | 1.4 mm | 8 | |
| 2 Sept. | Partly cloudy | 35° /25° | 0.9 mm | 8 | |
| 3 Sept. | Cloudy | 33° /25° | 1.3 mm | 8 | |
| 4 Sept. | Light rain shower | 31° /24° | 6.2 mm | 8 | |
| 5 Sept. | Patchy rain possible | 35° /25° | 2.8 mm | 8 | |
| 6 Sept. | Light rain shower | 36° /24° | 3.3 mm | 8 | |
| 7 Sept. | Light rain shower | 32° /25° | 33.4 mm | 7 | |
| 8 Sept. | Patchy rain possible | 31° /24° | 18.1 mm | 7 | |
| 9 Sept. | Light rain shower | 31° /24° | 17.2 mm | 7 | |
| 10 Sept. | Torrential rain shower | 29° /24° | 30.3 mm | 7 | |
| 11 Sept. | Moderate or heavy rain shower | 29° /24° | 33.3 mm | 7 | |
| 12 Sept. | Moderate or heavy rain shower | 30° /24° | 34.9 mm | 7 | |
| 13 Sept. | Heavy rain | 29° /22° | 52.3 mm | 7 | |
| 14 Sept. | Mist | 28° /23° | 0.9 mm | 6 | |
| 15 Sept. | Overcast | 32° /24° | 4.9 mm | 7 | |
| 16 Sept. | Patchy light rain | 31° /24° | 10.9 mm | 7 | |
| 17 Sept. | Light rain shower | 31° /24° | 17.2 mm | 7 | |
| 18 Sept. | Light rain shower | 30° /24° | 13.5 mm | 7 | |
| 19 Sept. | Light rain shower | 33° /23° | 8.6 mm | 7 | |
| 20 Sept. | Light rain shower | 30° /24° | 12.3 mm | 7 | |
| 21 Sept. | Light rain shower | 33° /24° | 10.1 mm | 7 | |
| 22 Sept. | Patchy rain possible | 30° /24° | 12.6 mm | 7 | |
| 23 Sept. | Light rain shower | 31° /24° | 0.8 mm | 7 | |
| 24 Sept. | Light rain shower | 29° /22° | 2.1 mm | 7 | |
| 25 Sept. | Moderate or heavy rain shower | 28° /23° | 4 mm | 6 | |
| 26 Sept. | Light rain shower | 29° /23° | 4.6 mm | 7 | |
| 27 Sept. | Light rain shower | 28° /23° | 9.4 mm | 6 | |
| 28 Sept. | Light rain shower | 31° /24° | 7.4 mm | 7 | |
| 29 Sept. | Light rain shower | 31° /24° | 12.5 mm | 7 | |
| 30 Sept. | Moderate or heavy rain shower | 32° /24° | 14.7 mm | 7 | |
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Important Notice
Our weather forecast for Hanoi 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 Hanoi forecast closer to your planned date for the most up-to-date weather information.
Hanoi in September - FAQ
What are the expected maximum and minimum temperatures in Hanoi during September?
During September, expect a variety of temperatures with highs around 31° and lows near 24°, suitable for diverse activities and preferences.
How much rainfall should be expected in Hanoi during September?
Significant rainfall exceeding 350.5 mm is expected in Hanoi during September, occurring over more than 26 days. Preparing for wet conditions is recommended in your planning.
What are the typical wind conditions in Hanoi during September?
The average wind speed in Hanoi during September is 13 km/h, suggesting breezy to windy conditions, depending on your activities.
What to pack to Hanoi in September?
As you prepare for your trip to Hanoi 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 Hanoi, 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
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