Weather in Vientiane: September
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Average day temperature: | 87.6°F |
| Average night temperature: | 75.2°F | |
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Number of sunny days: | 6 days |
| Day length: | 12.0 - 12.5 hours | |
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Number of rainy days: | 14 days |
| Precipitation totals: | 7.4 in. | |
| more information | ||
14 days
forecast
forecast
| Vientiane |
weather in
October
October
| Vientiane |
Air temperature in September, °F
Show year:
2025
2024
2023
The highest day temperature during September of 2025 was 90°F. At the same time the lowest night temperature was 73°F. Daily and nightly averages during September were 85.3°F and 74.3°F.
Sunny, partly cloudy and cloudy days
Mostly all days in September are cloudy but sunny and partly cloudy days are also possible.
Precipitation total in September, in.
Precipitation total value in Vientiane in September is 7.7 in. It makes september one of the most rainy months of the year.
Wind speed in September, mph
The average wind speed value in September is 3.6 mph It makes September one of the least windy months of the year.
Average sunny hours
This chart shows average number of hours during the day when sunlight can reach the ground. It depends on day length and cloudiness during the day. The average number of sunny hours in September is: 3.9.
Best time for vacation in Vientiane
Vientiane on a weather map
Places in Laos:
Name
°F
24 Hours Forecast
Vientiane
Local time: 17:48
December 20, saturday
1800
75°F
S
1 mph
1 mph
2100
72°F
SE
3 mph
3 mph
December 21, sunday
0000
68°F
S
4 mph
4 mph
0300
64°F
W
4 mph
4 mph
0600
63°F
W
3 mph
3 mph
0900
72°F
W
4 mph
4 mph
1200
81°F
SW
6 mph
6 mph
1500
84°F
SW
4 mph
4 mph
