Weather in Vietnam for September 2025
In general, the average temperature in Vietnam at the beginning of September is 33 °C. As the month progressed, temperatures tended to noticeably cool down, reaching an average of 30.3 °C by the end of September.
Vietnam experiences heavy rainfall in September, with over 20 rainy days and an average total precipitation 305.6 mm.
Is September a good time to visit Vietnam? check out the best time to travel to Vietnam page.
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Vietnam in September average weather
| Mon. | Tue. | Wed. | Thu. | Fri. | Sat. | Sun. |
|---|---|---|---|---|---|---|
| 1  33° | 2  33° | 3  33° | 4 31° | 5 34° | 6 35° | 7 32° |
| 8 30° | 9 30° | 10  30° | 11  31° | 12 32° | 13 30° | 14 30° |
| 15 32° | 16 31° | 17 31° | 18 31° | 19  33° | 20 31° | 21 33° |
| 22 30° | 23 32° | 24 30° | 25 29° | 26 30° | 27 30° | 28 31° |
| 29 31° | 30 31° |
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Temperatures trend during September in Vietnam
September weather day by day
| Date | Weather | Temperatures | Rain | UV | More |
|---|---|---|---|---|---|
| 1 Sept. | Moderate or heavy rain shower | 33° /25° | 4.3 mm | 7 | |
| 2 Sept. | Heavy rain at times | 33° /25° | 2.2 mm | 8 | |
| 3 Sept. | Patchy rain possible | 33° /25° | 1.3 mm | 7 | |
| 4 Sept. | Heavy rain at times | 31° /24° | 4.6 mm | 7 | |
| 5 Sept. | Moderate or heavy rain shower | 34° /24° | 3.6 mm | 8 | |
| 6 Sept. | Moderate rain at times | 35° /24° | 2.2 mm | 8 | |
| 7 Sept. | Light rain shower | 32° /24° | 20 mm | 7 | |
| 8 Sept. | Moderate or heavy rain shower | 30° /24° | 22.3 mm | 7 | |
| 9 Sept. | Moderate rain at times | 30° /24° | 14.4 mm | 7 | |
| 10 Sept. | Partly cloudy | 30° /24° | 16.1 mm | 7 | |
| 11 Sept. | Sunny | 31° /24° | 17.1 mm | 7 | |
| 12 Sept. | Sunny | 32° /24° | 17.5 mm | 7 | |
| 13 Sept. | Moderate or heavy rain shower | 30° /23° | 32.2 mm | 7 | |
| 14 Sept. | Patchy rain possible | 30° /24° | 6 mm | 7 | |
| 15 Sept. | Moderate or heavy rain shower | 32° /24° | 5.7 mm | 7 | |
| 16 Sept. | Moderate or heavy rain shower | 31° /24° | 15.7 mm | 7 | |
| 17 Sept. | Moderate or heavy rain shower | 31° /24° | 15.6 mm | 7 | |
| 18 Sept. | Light rain shower | 31° /23° | 7.8 mm | 7 | |
| 19 Sept. | Overcast | 33° /24° | 4.3 mm | 7 | |
| 20 Sept. | Light rain shower | 31° /24° | 7.5 mm | 7 | |
| 21 Sept. | Light rain shower | 33° /24° | 9 mm | 7 | |
| 22 Sept. | Moderate or heavy rain shower | 30° /24° | 11.5 mm | 6 | |
| 23 Sept. | Moderate or heavy rain shower | 32° /23° | 4.2 mm | 7 | |
| 24 Sept. | Patchy rain possible | 30° /23° | 6.2 mm | 7 | |
| 25 Sept. | Moderate or heavy rain shower | 29° /23° | 8.2 mm | 6 | |
| 26 Sept. | Patchy rain possible | 30° /23° | 4.2 mm | 7 | |
| 27 Sept. | Patchy rain possible | 30° /23° | 5 mm | 7 | |
| 28 Sept. | Partly cloudy | 31° /23° | 10.9 mm | 7 | |
| 29 Sept. | Partly cloudy | 31° /24° | 13 mm | 7 | |
| 30 Sept. | Moderate or heavy rain shower | 31° /23° | 12.8 mm | 7 | |
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Guide for Vietnam in September
In September, Vietnam experiences varying weather conditions from north to south. In the northern regions, such as Hanoi, the beginning of September sees the tail end of the summer season, with temperatures averaging around 28°.
However, as the month progresses, the weather begins to transition into the autumn season, bringing cooler temperatures and occasional rain showers. By the end of September, temperatures in Hanoi can drop to around 25°.
Moving south to Ho Chi Minh City, the weather in September is characterized by hot and humid conditions at the start of the month, with temperatures averaging around 30°. As the month progresses, the heat begins to subside, and occasional rain showers provide relief from the humidity.
By the end of September, temperatures in Ho Chi Minh City can decrease to around 28°.
In central Vietnam, cities like Da Nang experience similar weather patterns, with temperatures starting around 29° at the beginning of the month and dropping to around 26° by the end of September.
Overall, September marks the transition from the peak of summer to the onset of the cooler autumn season in Vietnam.
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Vietnam in September - FAQ
What to pack to Vietnam in September?
As you prepare for your trip to Vietnam 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 Vietnam, 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 Vietnam
UV exposure in Vietnam during September
Quick links
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