Weather in Vientiane in September
Vientiane, Laos averages a high of 29.7°C (85.5°F) and low of 23.8°C (74.8°F) in September, with 24 rain days and 8.3 hours of daily sunshine. Travel score: 63.5/100 (Good). The best time to visit Vientiane is December.
High
30°C85°F
Low
24°C75°F
🌧️
24
rain days
☀️
8.3
hrs/day sunshine
💧
86%
humidity
64— Good
September in Vientiane is hot and very rainy — pack an umbrella and enjoy indoor attractions too.
What are the average temperatures in Vientiane?
How much does it rain in Vientiane in September?
Vientiane receives an average of 318.3mm of rainfall across 24 rainy days in September. The annual total is 1921.3mm.
What should I pack for Vientiane in September?
Essentials
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Comfortable walking shoes
Essential for exploring the city
👕
Light layers and t-shirts
Warm weather around 30°C
🧥
Waterproof jacket
Frequent rain expected (24 rainy days)
☔
Umbrella
Essential for the rainy season
👢
Waterproof shoes
Keep your feet dry in wet conditions
🧴
Sunscreen SPF 30+
8 hours of sunshine daily
🕶️
Sunglasses
Protect your eyes from bright sun
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Data based on 1994–2024 averages · Last updated: 2024-12-31