Vientiane Prefecture (Vientiane)
September
Weather in Vientiane Prefecture for September 2025
Your guide to Vientiane Prefecture weather in September - trends and predictions
Until now, September 2025 in Vientiane Prefecture is slightly cooler than the historical average by -0.7 °C.
The forecast for the next days in Vientiane Prefecture predicts temperatures to be around 29 °C, close to the historical average.
In general, the average temperature in Vientiane Prefecture at the beginning of September is 31.4 °C. As the month progressed, temperatures tended to significantly cool down, reaching an average of 27.7 °C by the end of September.
Vientiane Prefecture experiences heavy rainfall in September, with over 20 rainy days and an average total precipitation 502.3 mm.
Temperatures
Rain 🌧️
0
Dry days
30
Rainy days
0
Snow days
29°/23°
Temperatures
8 km/h
Avg max wind
87 %
Avg humidity
Vientiane Prefecture Weather September
Move between months or click on a day
Temperatures trend during September in Vientiane Prefecture
See the weather trend as well as the moving average line
September weather in Vientiane Prefecture day by day
Click on a date for more information
| Date | Weather | Temperatures | Rain | UV | More |
|---|---|---|---|---|---|
| 1 Sept. |  Light rain shower | 32° /22° | 11.3 mm | 7 | |
| 2 Sept. | Light rain shower | 31° /23° | 30.4 mm | 7 | |
| 3 Sept. | Patchy rain possible | 31° /23° | 11.6 mm | 7 | |
| 4 Sept. |  Patchy light rain with thunder | 32° /23° | 17.1 mm | 7 | |
| 5 Sept. | Light rain shower | 32° /23° | 15.2 mm | 7 | |
| 6 Sept. |  Moderate or heavy rain shower | 31° /22° | 28.9 mm | 6 | |
| 7 Sept. | Patchy light rain with thunder | 31° /23° | 20 mm | 7 | |
| 8 Sept. | Light rain shower | 31° /23° | 15.7 mm | 7 | |
| 9 Sept. | Light rain shower | 29° /23° | 28.9 mm | 6 | |
| 10 Sept. | Light rain shower | 29° /23° | 23.5 mm | 6 | |
| 11 Sept. | Light rain shower | 29° /22° | 39.2 mm | 6 | |
| 12 Sept. | Moderate or heavy rain shower | 30° /22° | 9.3 mm | 7 | |
| 13 Sept. |  Mist | 28° /22° | 7.3 mm | 6 | |
| 14 Sept. | Fog | 28° /22° | 10.3 mm | 6 | |
| 15 Sept. | Fog | 28° /22° | 3.1 mm | 6 | |
| 16 Sept. | Light rain shower | 28° /22° | 15.9 mm | 6 | |
| 17 Sept. | Light rain shower | 30° /22° | 24.8 mm | 7 | |
| 18 Sept. |  Heavy rain | 31° /23° | 21.2 mm | 2.8 | |
| 19 Sept. | Heavy rain | 31° /23° | 24.7 mm | 2.5 | |
| 20 Sept. | Heavy rain | 28° /23° | 27.1 mm | 2.4 | |
| 21 Sept. |  Moderate rain | 30° /23° | 8.7 mm | 1.3 | |
| 22 Sept. | Moderate rain | 29° /23° | 9.1 mm | 6 | |
| 23 Sept. | Moderate rain | 30° /24° | 5.6 mm | 6 | |
| 24 Sept. | Patchy rain possible | 31° /24° | 0.6 mm | 6 | |
| 25 Sept. | Patchy rain possible | 26° /24° | 1.7 mm | 5 | |
| 26 Sept. | Patchy rain possible | 29° /23° | 4.7 mm | 6 | |
| 27 Sept. | Patchy rain possible | 26° /23° | 4.2 mm | 5 | |
| 28 Sept. | Patchy rain possible | 24° /22° | 3.8 mm | 5 | |
| 29 Sept. | Patchy rain possible | 27° /22° | 2.6 mm | 5 | |
| 30 Sept. | Patchy rain possible | 31° /22° | 0.7 mm | 6 | |
| Next | |||||
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.
Change Month
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 502.3 mm is expected in Vientiane Prefecture during September, occurring over more than 30 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 8 km/h, suggesting breezy to windy conditions, depending on your activities.
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 ☀️
Top locations in Vientiane Prefecture
Select a location for an accurate weather forecast
More Locations Quick links
More Vientiane Prefecture weather pages
You are here
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.
Found a mistake?
We appreciate your attention to details. Tell us here.