Laos (Vientiane)
September
Weather in Laos for September 2027
Your guide to Laos weather in September - trends and predictions
In general, the average temperature in Laos 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.
Laos 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 Laos? check out the best time to travel to Laos 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
Laos Weather September
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What’s the Weather Like in Laos This September?
Discover the average temperatures and weather trends across Laos’s cities this September.
Temperatures trend during September in Laos
See the weather trend as well as the moving average line
September weather in Laos 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 | |
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Important Notice
Our weather forecast for Laos 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 Laos forecast closer to your planned date for the most up-to-date weather information.
Change Month
Laos in September - FAQ
What are the expected maximum and minimum temperatures in Laos 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 Laos during September?
Significant rainfall exceeding 449.4 mm is expected in Laos during September, occurring over more than 28 days. Preparing for wet conditions is recommended in your planning.
What are the typical wind conditions in Laos during September?
The average wind speed in Laos during September is 9 km/h, suggesting breezy to windy conditions, depending on your activities.
September rainfall patterns in Laos
Explore the daily rainfall trends and prepare for Laoss September weather 💧
Typically, Laos has 28 rainy days in September with a total of 449.4 mm of rainfall.
UV exposure in Laos during September
Stay informed about UV levels for safe outdoor activities throughout the month of September ☀️
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