Weather in Chiang Mai in September
It's a rainy period, but great for indoor activities, museums, and lower prices.
Climate Overview
September is a wet time to visit Chiang Mai. Chiang Mai has a Tropical climate with average yearly highs of 30°C, lows of 24°C, and approximately 26 rainy days per month.
30°C
24°C
26days
12.3h
Is September a good time to visit Chiang Mai?
It's a rainy period, but great for indoor activities, museums, and lower prices.
Daylight
6:13 AM
6:28 PM
Weather by Month
| Month | High | Low | Rainy days | Condition |
|---|---|---|---|---|
| January | 29°C | 17°C | 0 | Excellent (best) |
| February | 32°C | 18°C | 0 | Excellent (best) |
| March | 36°C | 21°C | 0 | Good |
| April | 36°C | 24°C | 7 | Good |
| May | 36°C | 26°C | 15 | Wet |
| June | 33°C | 25°C | 28 | Wet |
| July | 31°C | 24°C | 29 | Wet |
| August | 29°C | 24°C | 31 | Wet |
| September | 30°C | 24°C | 26 | Wet |
| October | 29°C | 22°C | 18 | Wet |
| November | 29°C | 20°C | 8 | Excellent (best) |
| December | 28°C | 16°C | 0 | Excellent (best) |
Weather data: Open-Meteo Archive (2020-2025) • Open-Meteo.com (CC BY 4.0) • Historical avg. 2020–2025
What to Pack for September
Humidity-wicking clothes, insect repellent, waterproof bag, and rain poncho.
Planning a trip to Chiang Mai?
Common Questions
Is September a good time to visit Chiang Mai? +
September is typically Wet for visiting Chiang Mai, with average highs of 30°C and around 26 rainy days.
What should I pack for Chiang Mai in September? +
With highs of 30°C and lows of 24°C in {month}, we recommend: Humidity-wicking clothes, insect repellent, waterproof bag, and rain poncho.
Does it rain a lot in Chiang Mai in September? +
Chiang Mai typically sees around 26 rainy days in September.
How many hours of daylight are there in Chiang Mai in September? +
In September, Chiang Mai gets approximately 12.3 hours of daylight per day.
Is September peak season in Chiang Mai? +
No, September is not peak season in Chiang Mai. Expect better value on accommodation and fewer tourists.
What is the best month to visit Chiang Mai? +
The best months to visit Chiang Mai are November, December, January, February, when the weather is optimal for sightseeing.
More Chiang Mai Guides
Best Time to Visit
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Things to Do
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Itineraries
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Overview
Complete travel guide for Chiang Mai: top things to do, itineraries, and typical costs.