| < September >
|Normal Max/ High Temperature
|Min/ Low Temperature
|Number of Wet Days (probability of rain on a day)
|Average Sunlight per day
|Average Daylight per day
|Sunny (Cloudy) Daylight Hours
|Sun altitude at solar noon on the 21st day.
- The average temperature in Vientiane in September is hot at 27 °C (80.6 °F).
- Afternoons can be hot with average high temperatures reaching 27.5 °C (81.5 °F).
- Overnight temperatures are generally fairly hot with an average low of 24.1 °C (75.4 °F).
- The average diurnal temperature range/ variation in September is 3.4 °C (6.1 °F).
- The weather in September is pretty drenched with rain once in a while. A hearty 295mm (11.6in) of liquid is deposited during an average of 15 days.
- In September the blue above Vientiane is fair having an average of an unexceptional 5:36 of radiant sunshine per day.
- The shortest day is 11:57 long and the longest day is 12:27 long with an average length of 12:12.
- There are approximately 6:28 per day when bright sunshine is absent due to cloud, haze or the sun being too low on the horizon to register.
- It is sunny approximately 46.4% of daylight hours and cloudy 53.6% of daylight hours.
Check the distance to and compare the Vientiane September averages with somewhere beginning with:
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Weather Trend Graph for September in Vientiane, Laos
Navigate to September Weather in Locations Surrounding Vientiane:
- Luang Prabang, Laos - 219.8 kms (136.6 miles) NNW
- Nan/ Muang Nan, Thailand - 210.9 kms (131 miles) WNW
- Lampang, Thailand - 325.5 kms (202.2 miles) W
- Phrae, Thailand - 255 kms (158.5 miles) W
- Uttaradit East, Thailand - 264 kms (164 miles) W
- Loei, Thailand - 104.4 kms (64.9 miles) WSW
- Phitsanulok/ Sarit, Thailand - 274.9 kms (170.8 miles) WSW
- Phetchabun, Thailand - 225.8 kms (140.3 miles) SW
- Chaiyaphum, Thailand - 244.6 kms (152 miles) SSW
- Korat/ Nakhon Ratcha, Thailand - 335.5 kms (208.5 miles) S