January in Chiang Mai — the year's strongest window
Best window · 9.3/10January averages 19°C (66°F), the range most people find easiest for walking a city all day without either overheating or losing daylight to weather.
Rain is a non-issue at 14 mm for the month, with about 19 sunny days and 11 hours of daylight to work with.
On our climate-comfort scale this is the top-ranked month of the year for Chiang Mai at 9.3/10 — the reference point every other month on this page is measured against.
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 — the year's strongest window
Best window · 9.8/10February averages 21°C (69°F) — warm enough for beach and boat plans, still short of the heat that pushes sightseeing into early morning.
Expect 20 mm of rain — occasional showers rather than washed-out days — alongside about 22 sunny days and 11.4 daylight hours.
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.
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 light clothing, swimwear and real sun protection.
March in Chiang Mai — the year's strongest window
Best window · 8.9/10March averages 25°C (76°F) — warm enough for beach and boat plans, still short of the heat that pushes sightseeing into early morning.
Expect 28 mm of rain — occasional showers rather than washed-out days — alongside about 26 sunny days and 11.9 daylight hours.
On our climate-comfort scale this is the top-ranked month of the year for Chiang Mai at 8.9/10 — the reference point every other month on this page is measured against.
Expect mid-season pricing, and crowds are moderate.
Pack light clothing, swimwear and real sun protection.
April in Chiang Mai — workable with trade-offs
Trade-offs · 6.9/10April averages 28°C (82°F), so the practical pattern is early mornings, a long midday break, and evenings back outside.
Rainfall runs 62 mm, so plan one flexible day in three; you still get about 27 sunny days and 12.4 hours of daylight.
It scores 6.9/10 here, 6th of 12 months, against 9.8/10 in the destination's best month.
Expect 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 — the hardest end of the year
Hardest · 4.5/10May averages 26°C (79°F) with humidity around 74%, so the practical pattern is early mornings, a long midday break, and evenings back outside.
216 mm of rain puts this in monsoon territory — about 23 sunny days across the whole month, and multi-day washouts are normal.
It scores 4.5/10 here, 10th of 12 months, against 9.8/10 in the destination's best month.
Expect low-season pricing, and 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.
If your dates are flexible, February is materially better in Chiang Mai — 5.3 points higher on the same scale.
June in Chiang Mai — workable with trade-offs
Trade-offs · 5.6/10June averages 25°C (77°F) — warm enough for beach and boat plans, still short of the heat that pushes sightseeing into early morning.
At 120 mm this is a genuinely wet month: about 17 sunny days in total, and outdoor plans need an indoor fallback.
It scores 5.6/10 here, 7th of 12 months, against 9.8/10 in the destination's best month.
Expect low-season pricing, and crowds are light for this destination.
Pack light clothing, swimwear 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 — the hardest end of the year
Hardest · 4.7/10July averages 25°C (77°F) — warm enough for beach and boat plans, still short of the heat that pushes sightseeing into early morning.
At 176 mm this is a genuinely wet month: about 16 sunny days in total, and outdoor plans need an indoor fallback.
It scores 4.7/10 here, 9th of 12 months, against 9.8/10 in the destination's best month.
Expect mid-season pricing, and crowds are moderate.
Pack light clothing, swimwear 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) — warm enough for beach and boat plans, still short of the heat that pushes sightseeing into early morning.
272 mm of rain puts this in monsoon territory — about 14 sunny days 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.
Expect low-season pricing, and crowds are light for this destination.
Pack light clothing, swimwear and real sun protection, a proper rain shell rather than an umbrella.
If your dates are flexible, February is materially better in Chiang Mai — 5.7 points higher on the same scale.
September in Chiang Mai — the hardest end of the year
Hardest · 4/10September averages 24°C (75°F) — warm enough for beach and boat plans, still short of the heat that pushes sightseeing into early morning.
366 mm of rain puts this in monsoon territory — about 14 sunny days 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.
Expect low-season pricing, and crowds are light for this destination.
Pack light clothing, swimwear and real sun protection, a proper rain shell rather than an umbrella.
If your dates are flexible, February is materially better in Chiang Mai — 5.8 points higher on the same scale.
October in Chiang Mai — workable with trade-offs
Trade-offs · 5.1/10October averages 23°C (73°F) — warm enough for beach and boat plans, still short of the heat that pushes sightseeing into early morning.
At 180 mm this is a genuinely wet month: about 16 sunny days in total, and outdoor plans need an indoor fallback.
It scores 5.1/10 here, 8th of 12 months, against 9.8/10 in the destination's best month.
Expect low-season pricing, and crowds are light for this destination.
Pack light clothing, swimwear 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 in Chiang Mai — the year's strongest window
Best window · 8.8/10November averages 21°C (70°F) — warm enough for beach and boat plans, still short of the heat that pushes sightseeing into early morning.
Expect 29 mm of rain — occasional showers rather than washed-out days — alongside about 16 sunny days and 11.1 daylight hours.
On our climate-comfort scale this is the top-ranked month of the year for Chiang Mai at 8.8/10 — the reference point every other month on this page is measured against.
Expect mid-season pricing, and crowds are moderate.
Pack light clothing, swimwear and real sun protection.
December in Chiang Mai — the year's strongest window
Best window · 8.8/10December averages 20°C (68°F) — warm enough for beach and boat plans, still short of the heat that pushes sightseeing into early morning.
Expect 20 mm of rain — occasional showers rather than washed-out days — alongside about 15 sunny days and 10.9 daylight hours.
On our climate-comfort scale this is the top-ranked month of the year for Chiang Mai at 8.8/10 — the reference point every other month on this page is measured against.
Expect peak pricing, and crowds are moderate.
Pack light clothing, swimwear and real sun protection.
