September · Thailand
Best time to visit Pai in September Weather, crowds & prices
Weather in Pai in September
Average temperature 23°C, 338 mm of rain, about 14 days with 6+ hours of sunshine and 89% humidity — based on the five most recent complete years of ERA5 data (2021–2025).
September score
5.1/10
Ranked #12 of 12 months
- Avg temp
- 23°C
- Rainfall
- 338 mm
- Humidity
- 89%
- Days with 6h+ sun
- 14
- Crowd Density
- Quiet / Uncrowded
- Average Expenses
- $ · Budget Friendly ($)
September in Pai scores 5.1/10 for nature and wildlife travel - ranked #12 of 12. Expect around 23°C, 338 mm of rain, and roughly 14 days with 6+ hours of sunshine this month.
Pai is a small town in northern Thailand's hills, known for hot springs, canyon viewpoints and a relaxed river scene.
September in Pai — middling scores, decent value
September averages 23°C (74°F) — warm for the outdoors: start trails early, use shaded routes at midday, and carry more water than you think you need.
338 mm of rain puts this in monsoon territory — about 14 days with 6+ hours of sunshine across the whole month, and multi-day washouts are normal.
It scores 5.1/10 here, 12th of 12 months, against 9.7/10 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 4.6 points higher here — enough to change the trip.
Frequently asked
- What is the weather like in Pai in September?
- In September, Pai averages 23°C, 338 mm of rain, and about 14 days with 6+ hours of sunshine. Its climate-comfort score is 5.1/10.
- Is September a good time to visit Pai?
- September earns a 5.1/10 climate-comfort score. Use the year-round chart to weigh the weather against your budget and crowd preferences.
- How much does it rain in Pai in September?
- Expect about 338 mm of rain in September. Average humidity is 89% and there are about 14 days with 6+ hours of sunshine.
Curated in Pai
Tickets & experiences
Things to do in Pai
Pai, Thailand. Live activities and tours from GetYourGuide, matched to this destination.