Vientiane Prefecture (Vientiane)
September
Weather in Vientiane Prefecture for September 2025
Your guide to Vientiane Prefecture weather in September - trends and predictions
In general, the average temperature in Vientiane Prefecture at the beginning of September is 31.9 °C. As the month progressed, temperatures tended to significantly cool down, reaching an average of 28.6 °C by the end of September.
Vientiane Prefecture experiences an exceptionally high level of rainfall in September, with more than 24 rainy days on average.
Is September a good time to visit Vientiane Prefecture? check out the best time to travel to Vientiane Prefecture page.
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2
Dry days
28
Rainy days
0
Snow days
29°/23°
Temperatures
9 km/h
Avg max wind
88 %
Avg humidity
Vientiane Prefecture in September average weather
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| Mon. | Tue. | Wed. | Thu. | Fri. | Sat. | Sun. |
|---|---|---|---|---|---|---|
| 1  32° | 2  31° | 3  33° | 4  32° | 5 32° | 6 32° | 7 31° |
| 8 30° | 9 30° | 10 30° | 11 29° | 12 29° | 13  27° | 14 26° |
| 15 29° | 16 29° | 17 30° | 18 29° | 19 31° | 20 27° | 21 30° |
| 22 29° | 23 28° | 24 27° | 25 29° | 26 27° | 27 30° | 28 30° |
| 29 30° | 30  27° |
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Temperatures trend during September in Vientiane Prefecture
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. | Moderate or heavy rain shower | 32° /23° | 14.3 mm | 7 | |
| 2 Sept. | Torrential rain shower | 31° /23° | 33.1 mm | 7 | |
| 3 Sept. | Patchy rain possible | 33° /23° | 12.9 mm | 7 | |
| 4 Sept. | Patchy light rain with thunder | 32° /24° | 16.9 mm | 7 | |
| 5 Sept. | Light rain shower | 32° /23° | 18.4 mm | 7 | |
| 6 Sept. | Moderate or heavy rain shower | 32° /22° | 37.1 mm | 7 | |
| 7 Sept. | Moderate or heavy rain shower | 31° /23° | 28.2 mm | 7 | |
| 8 Sept. | Light rain shower | 30° /23° | 21.7 mm | 7 | |
| 9 Sept. | Patchy light rain with thunder | 30° /23° | 36.8 mm | 7 | |
| 10 Sept. | Light rain shower | 30° /23° | 23 mm | 7 | |
| 11 Sept. | Light rain shower | 29° /22° | 54.4 mm | 7 | |
| 12 Sept. | Moderate or heavy rain shower | 29° /23° | 8.6 mm | 7 | |
| 13 Sept. | Mist | 27° /22° | 1.9 mm | 6 | |
| 14 Sept. | Fog | 26° /22° | 13.1 mm | 6 | |
| 15 Sept. | Fog | 29° /23° | 1.4 mm | 7 | |
| 16 Sept. | Light rain shower | 29° /22° | 18.9 mm | 7 | |
| 17 Sept. | Light rain shower | 30° /22° | 24.8 mm | 7 | |
| 18 Sept. | Moderate or heavy rain shower | 29° /22° | 30.2 mm | 6 | |
| 19 Sept. | Light rain shower | 31° /22° | 6.5 mm | 7 | |
| 20 Sept. | Patchy light rain with thunder | 27° /21° | 9.8 mm | 6 | |
| 21 Sept. | Moderate or heavy rain shower | 30° /22° | 5.1 mm | 7 | |
| 22 Sept. | Patchy rain possible | 29° /23° | 13.8 mm | 6 | |
| 23 Sept. | Light rain shower | 28° /22° | 11.9 mm | 6 | |
| 24 Sept. | Patchy rain possible | 27° /22° | 10.6 mm | 6 | |
| 25 Sept. | Patchy rain possible | 29° /22° | 2.3 mm | 7 | |
| 26 Sept. | Light rain shower | 27° /21° | 9 mm | 6 | |
| 27 Sept. | Light rain shower | 30° /22° | 4.3 mm | 7 | |
| 28 Sept. | Light rain shower | 30° /22° | 8.9 mm | 7 | |
| 29 Sept. | Light rain shower | 30° /22° | 12.9 mm | 7 | |
| 30 Sept. | Patchy light drizzle | 27° /23° | 11.4 mm | 6 | |
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Important Notice
Our weather forecast for Vientiane Prefecture 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 Vientiane Prefecture forecast closer to your planned date for the most up-to-date weather information.
Vientiane Prefecture in September - FAQ
What are the expected maximum and minimum temperatures in Vientiane Prefecture 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 Vientiane Prefecture during September?
Significant rainfall exceeding 689.8 mm is expected in Vientiane Prefecture during September, occurring over more than 28 days. Preparing for wet conditions is recommended in your planning.
What are the typical wind conditions in Vientiane Prefecture during September?
The average wind speed in Vientiane Prefecture during September is 9 km/h, suggesting breezy to windy conditions, depending on your activities.
What to pack to Vientiane Prefecture in September?
As you prepare for your trip to Vientiane Prefecture 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 Vientiane Prefecture, 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
September rainfall patterns in Vientiane Prefecture
Explore the daily rainfall trends and prepare for Vientiane Prefectures September weather 💧
UV exposure in Vientiane Prefecture during September
Stay informed about UV levels for safe outdoor activities throughout the month of September ☀️
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Where is Vientiane Prefecture?Get accurate weather forecasts for Vientiane Prefecture, located at latitude 17.967 and longitude 102.6. Stay updated with localized weather information tailored for Vientiane Prefecture.
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