Best Time to Visit Chiang Mai: Lantern Festival, Cool Mornings and the Smoky Months to Avoid
Chiang Mai is best from November to February. From about late February to April, burning in the region can make the air smoky; the lantern festival lands on 24 November this year.
Quick answer: The best time to visit Chiang Mai is November to February: dry, cool mornings and clear days. March to April is hot, and from about late February to April crop burning across northern Thailand and the region often makes the air smoky, which is bad for views and for anyone with asthma. June to October is green and rainy. This year Loy Krathong and Yi Peng fall around 24 and 25 November 2026.
Chiang Mai by season
| Months | Weather and air | Notes |
|---|---|---|
| November to February | Dry, cool nights, clear | Best time; popular, book early |
| Late February to April | Hot, and often smoky | Check the air-quality forecast before booking; Songkran on 13 to 15 April |
| May to October | Warm and green, regular rain | Cheaper; good for waterfalls and elephant sanctuaries |
The lantern festival
Yi Peng is Chiang Mai's lantern festival and coincides with Loy Krathong. Sources disagree on the exact nights and on the rules for releasing lanterns, and some events are ticketed. Book hotels months ahead and check local announcements.
Is Chiang Mai good in January?
Yes, it is one of the best months. Mornings are cool enough for a light jacket; the flower festival is around early February.
When is the worst time to go?
For air quality, March is the one to avoid. For heat, April. For rain, September.
How long should I stay?
Three nights covers old-city temples, a night market, a cooking class and a doi Suthep or elephant day trip. Pair it with Bangkok for a week in the north and centre.
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*Loy Krathong and Yi Peng dates: Two Wandering Soles, read 5 November 2026; a few sources give 25 November, so confirm before booking.*
*Weather and season notes are long-term patterns, not forecasts, and one year can differ. Dates, visa rules and fees change, so confirm them with the official source before you book.*
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