September · Laos
Best time to visit Vang Vieng in September Weather, crowds & prices
Weather in Vang Vieng in September
Average temperature 25°C, 161 mm of rain, about 15 days with 6+ hours of sunshine and 87% humidity — based on the five most recent complete years of ERA5 data (2021–2025).
September score
5.4/10
Ranked #11 of 12 months
- Avg temp
- 25°C
- Rainfall
- 161 mm
- Humidity
- 87%
- Days with 6h+ sun
- 15
- Crowd Density
- Quiet / Uncrowded
- Average Expenses
- $ · Budget Friendly ($)
September in Vang Vieng scores 5.4/10 for nature and wildlife travel - ranked #11 of 12. Expect around 25°C, 161 mm of rain, and roughly 15 days with 6+ hours of sunshine this month.
Vang Vieng floats on the Nam Song river under limestone karst peaks, with caves and lagoons nearby.
September in Vang Vieng — middling scores, decent value
September averages 25°C (76°F) — warm for the outdoors: start trails early, use shaded routes at midday, and carry more water than you think you need.
At 161 mm this is a genuinely wet month: about 15 days with 6+ hours of sunshine in total, and outdoor plans need an indoor fallback.
It scores 5.4/10 here, 11th of 12 months, against 9.1/10 in the destination's best month.
Pack light clothing, a hat and real sun protection, a proper rain shell rather than an umbrella, footwear you can get muddy.
Plan for low-season pricing, with crowds are light for this destination.
Flexible dates? February scores 3.7 points higher here — enough to change the trip.
Frequently asked
- What is the weather like in Vang Vieng in September?
- In September, Vang Vieng averages 25°C, 161 mm of rain, and about 15 days with 6+ hours of sunshine. Its climate-comfort score is 5.4/10.
- Is September a good time to visit Vang Vieng?
- September earns a 5.4/10 climate-comfort score. Use the year-round chart to weigh the weather against your budget and crowd preferences.
- How much does it rain in Vang Vieng in September?
- Expect about 161 mm of rain in September. Average humidity is 87% and there are about 15 days with 6+ hours of sunshine.
Curated in Vang Vieng
Tickets & experiences
Things to do in Vang Vieng
Vang Vieng, Laos. Live activities and tours from GetYourGuide, matched to this destination.