Vientiane
September
Weather in Vientiane for September 2027
Your guide to Vientiane weather in September - trends and predictions
In general, the average temperature in Vientiane at the beginning of September is 31 °C. As the month progressed, temperatures tended to noticeably cool down, reaching an average of 28.4 °C by the end of September.
Vientiane experiences heavy rainfall in September, with over 20 rainy days and an average total precipitation 449.4 mm.
Is September a good time to visit Vientiane? check out the best time to travel to Vientiane page.
Temperatures
Rain 🌧️
More
2
Dry days
28
Rainy days
0
Snow days
29°/23°
Temperatures
9 km/h
Avg max wind
88 %
Avg humidity
Vientiane Weather September
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Temperatures trend during September in Vientiane
See the weather trend as well as the moving average line
September weather in Vientiane day by day
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| Date | Weather | Temperatures | Rain | UV | More |
|---|---|---|---|---|---|
| 1 Sept. |  Moderate rain | 32° /22° | 13.1 mm | 6 | |
| 2 Sept. | Moderate rain | 31° /23° | 24.2 mm | 7 | |
| 3 Sept. |  Light rain | 31° /23° | 9.7 mm | 7 | |
| 4 Sept. |  Patchy light rain with thunder | 31° /24° | 15.5 mm | 7 | |
| 5 Sept. | Moderate rain | 31° /23° | 17.8 mm | 7 | |
| 6 Sept. |  Heavy rain | 30° /23° | 25.2 mm | 5 | |
| 7 Sept. | Patchy light rain with thunder | 31° /23° | 23.7 mm | 6 | |
| 8 Sept. | Moderate rain | 30° /23° | 13.1 mm | 6 | |
| 9 Sept. | Moderate rain | 29° /23° | 24.7 mm | 5 | |
| 10 Sept. | Moderate rain | 29° /23° | 23.8 mm | 6 | |
| 11 Sept. | Heavy rain | 29° /23° | 29.6 mm | 7 | |
| 12 Sept. |  Moderate or heavy rain shower | 30° /22° | 7.3 mm | 7 | |
| 13 Sept. | Light rain | 29° /23° | 5.5 mm | 5 | |
| 14 Sept. | Moderate rain | 27° /23° | 11.3 mm | 5 | |
| 15 Sept. | Moderate rain | 27° /23° | 10.4 mm | 5 | |
| 16 Sept. | Moderate rain | 28° /22° | 20.5 mm | 5 | |
| 17 Sept. | Moderate rain | 29° /23° | 18.5 mm | 6 | |
| 18 Sept. | Heavy rain | 29° /23° | 26 mm | 5 | |
| 19 Sept. | Moderate rain | 31° /22° | 11.1 mm | 7 | |
| 20 Sept. | Moderate rain | 28° /22° | 12.4 mm | 6 | |
| 21 Sept. | Light rain | 30° /23° | 7.7 mm | 7 | |
| 22 Sept. | Moderate rain | 30° /23° | 10.6 mm | 8 | |
| 23 Sept. | Moderate rain | 29° /23° | 10.1 mm | 7 | |
| 24 Sept. | Moderate rain | 28° /23° | 13.5 mm | 5 | |
| 25 Sept. | Light rain | 29° /22° | 7.9 mm | 6 | |
| 26 Sept. | Moderate rain | 27° /22° | 10.9 mm | 5 | |
| 27 Sept. | Light rain | 30° /22° | 5.7 mm | 5 | |
| 28 Sept. | Light rain | 30° /22° | 8.1 mm | 6 | |
| 29 Sept. | Moderate rain | 28° /22° | 18.1 mm | 6 | |
| 30 Sept. | Moderate rain | 28° /23° | 13.6 mm | 5 | |
| Next | |||||
Important Notice
Our weather forecast for Vientiane 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 forecast closer to your planned date for the most up-to-date weather information.
Change Month
Vientiane in September - FAQ
What are the expected maximum and minimum temperatures in Vientiane 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 during September?
Significant rainfall exceeding 449.4 mm is expected in Vientiane 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 during September?
The average wind speed in Vientiane during September is 9 km/h, suggesting breezy to windy conditions, depending on your activities.
September rainfall patterns in Vientiane
Explore the daily rainfall trends and prepare for Vientianes September weather 💧
Typically, Vientiane has 28 rainy days in September with a total of 449.4 mm of rainfall.
UV exposure in Vientiane during September
Stay informed about UV levels for safe outdoor activities throughout the month of September ☀️
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