January in Chiang Mai — one of the year's strongest windows (2nd)
Best window · 9.3/10Temperatures hover around 19°C (66°F) — the kind of month where neither heat nor cold forces the schedule.
At just 14 mm for the month, rain will not shape your plans; you get about 19 days with 6+ hours of sunshine and 11 hours of daylight.
On our climate-comfort scale this is one of the strongest months of the year for Chiang Mai at 9.3/10 (2nd of 12), just behind February at 9.8/10.
Expect peak pricing, and this is one of the busiest months here. You are paying the year's highest rates for the year's best conditions — book early or shift a few weeks either side.
Pack layers you can shed by midday plus one warm layer for the evening.
February in Chiang Mai tops the year's climate scores
Best window · 9.8/10At 21°C (69°F) this is comfortable city weather in February, with sightseeing easiest before lunch and after the afternoon peak.
With around 20 mm of rain, any showers tend to pass through rather than settle in; about 22 days with 6+ hours of sunshine and 11.4 hours of daylight fill the rest.
On our climate-comfort scale this is the top-ranked month of the year for Chiang Mai at 9.8/10 — the reference point every other month on this page is measured against.
Budget for peak pricing, and this is one of the busiest months here. You are paying the year's highest rates for the year's best conditions — book early or shift a few weeks either side.
Pack light clothing, a hat and real sun protection.
March is one of the strongest months in Chiang Mai (3rd)
Best window · 8.9/10March averages 25°C (76°F) — pleasant for mornings and evenings on foot in the city, with a midday break when the sun is strongest.
Expect 28 mm of rain — occasional showers rather than washed-out days — alongside about 26 days with 6+ hours of sunshine and 11.9 daylight hours.
A 8.9/10 puts this among the year's best months in Chiang Mai (3rd of 12); only February scores higher, at 9.8/10.
Figure on peak pricing, with crowds are moderate. You are paying the year's highest rates for the year's best conditions — book early or shift a few weeks either side.
Pack light clothing, a hat and real sun protection.
April in Chiang Mai — workable with trade-offs
Trade-offs · 6.9/10Days in April average 28°C (82°F) — front-load outdoor plans before the heat builds and treat the middle of the day as indoor time.
Budget for roughly 62 mm of rain this month — a flexible day or two helps — with about 27 days with 6+ hours of sunshine and 12.4 hours of daylight to work around it.
That is 6.9/10 on the same scale — 6th of 12 months, versus 9.8/10 for the best month here.
Budget for mid-season pricing, and crowds are moderate.
Pack the lightest breathable clothing you own, a hat, and more water than feels necessary, a packable rain layer.
If your dates are flexible, February is materially better in Chiang Mai — 2.9 points higher on the same scale.
May in Chiang Mai — off-season conditions
Hardest · 4.5/10May averages 26°C (79°F) and humidity near 74%, so the practical pattern is early mornings, a long midday break, and evenings back outside.
216 mm makes this the wettest stretch of the year, though about 23 days with 6+ hours of sunshine still appear — keep an indoor fallback ready.
It scores 4.5/10 here, 10th of 12 months, against 9.8/10 in the destination's best month.
Plan for low-season pricing, with crowds are light for this destination.
Pack the lightest breathable clothing you own, a hat, and more water than feels necessary, a proper rain shell rather than an umbrella.
Flexible dates? February scores 5.3 points higher here — enough to change the trip.
June in Chiang Mai: mixed conditions, plan around the weather
Trade-offs · 5.6/10At 25°C (77°F) this is comfortable city weather in June, with sightseeing easiest before lunch and after the afternoon peak.
120 mm of rain signals a properly wet month, with only about 17 days with 6+ hours of sunshine to count on — build indoor options into the schedule.
That is 5.6/10 on the same scale — 7th of 12 months, versus 9.8/10 for the best month here.
Expect low-season pricing, and crowds are light for this destination.
Pack light clothing, a hat and real sun protection, a proper rain shell rather than an umbrella.
If your dates are flexible, February is materially better in Chiang Mai — 4.2 points higher on the same scale.
July in Chiang Mai — off-season conditions
Hardest · 4.7/10At 25°C (77°F) this is comfortable city weather in July, with sightseeing easiest before lunch and after the afternoon peak.
176 mm of rain signals a properly wet month, with only about 16 days with 6+ hours of sunshine to count on — build indoor options into the schedule.
That is 4.7/10 on the same scale — 9th of 12 months, versus 9.8/10 for the best month here.
Budget for low-season pricing, and crowds are moderate.
Pack light clothing, a hat and real sun protection, a proper rain shell rather than an umbrella.
If your dates are flexible, February is materially better in Chiang Mai — 5.1 points higher on the same scale.
August in Chiang Mai — the hardest end of the year
Hardest · 4.1/10August averages 24°C (76°F) — pleasant for mornings and evenings on foot in the city, with a midday break when the sun is strongest.
272 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 4.1/10 here, 11th of 12 months, against 9.8/10 in the destination's best month.
Figure on low-season pricing, with crowds are light for this destination.
Pack light clothing, a hat and real sun protection, a proper rain shell rather than an umbrella.
Flexible dates? February scores 5.7 points higher here — enough to change the trip.
September in Chiang Mai — the hardest end of the year
Hardest · 4/10September averages 24°C (75°F) — pleasant for mornings and evenings on foot in the city, with a midday break when the sun is strongest.
366 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 4/10 here, 12th of 12 months, against 9.8/10 in the destination's best month.
Figure on low-season pricing, with crowds are light for this destination.
Pack light clothing, a hat and real sun protection, a proper rain shell rather than an umbrella.
Flexible dates? February scores 5.8 points higher here — enough to change the trip.
October in Chiang Mai: mixed conditions, plan around the weather
Trade-offs · 5.1/10At 23°C (73°F) this is comfortable city weather in October, with sightseeing easiest before lunch and after the afternoon peak.
180 mm of rain signals a properly wet month, with only about 16 days with 6+ hours of sunshine to count on — build indoor options into the schedule.
That is 5.1/10 on the same scale — 8th of 12 months, versus 9.8/10 for the best month here.
Budget for low-season pricing, and crowds are light for this destination.
Pack light clothing, a hat and real sun protection, a proper rain shell rather than an umbrella.
If your dates are flexible, February is materially better in Chiang Mai — 4.7 points higher on the same scale.
November ranks 4th of 12 for Chiang Mai — one of the best windows
Best window · 8.8/10At 21°C (70°F) this is comfortable city weather in November, with sightseeing easiest before lunch and after the afternoon peak.
With around 29 mm of rain, any showers tend to pass through rather than settle in; about 16 days with 6+ hours of sunshine and 11.1 hours of daylight fill the rest.
On our climate-comfort scale this is one of the strongest months of the year for Chiang Mai at 8.8/10 (4th of 12), just behind February at 9.8/10.
Budget for mid-season pricing, and crowds are moderate.
Pack light clothing, a hat and real sun protection.
December ranks 5th of 12 for Chiang Mai — one of the best windows
Best window · 8.8/10December averages 20°C (68°F) — pleasant for mornings and evenings on foot in the city, with a midday break when the sun is strongest.
Expect 20 mm of rain — occasional showers rather than washed-out days — alongside about 15 days with 6+ hours of sunshine and 10.9 daylight hours.
A 8.8/10 puts this among the year's best months in Chiang Mai (5th of 12); only February scores higher, at 9.8/10.
Plan for peak pricing, with crowds are moderate.
Pack light clothing, a hat and real sun protection.
