Chiang Mai Weather
A month-by-month look at temperature, rainfall and what to pack in Chiang Mai. The annual average is 32°C high / 20°C low — hottest in April (36°C) and coldest in January (15°C).
Chiang Mai Weather at a Glance
As of 2026A quick summary of Chiang Mai's year-round climate and the best time to visit.
- Annual average
- 32° / 20°
- Best time to visit
- January, November, December
- Hottest month
- April (36°C)
- Coldest month
- January (15°C)
- Wettest month
- September (200mm)
- Driest month
- January (10mm)
As of 2026, Chiang Mai's weather averages 32°C high / 20°C low across the year, and the best time to visit for stable temperatures, rainfall and crowds is January, November, December. The hottest month is April (36°C), the coldest is January (15°C), and the wettest is September (200mm).
Best Time to Visit Chiang Mai
Peak month — cool, dry, clear skies. Highland cool 15°C lows mean light sweater. Pre-Lunar New Year hotel surge.
BEST MONTH — cool dry + Yi Peng Lantern Festival. Most-magical Thai festival. Hotels triple for Yi Peng — book 6+ months ahead.
Peak month — cool dry. Christmas + NYE surge. Highland cool 15°C lows perfect.
Chiang Mai Weather Month by Month
Tap any month for a detailed guide with what to wear, sunrise/sunset and air quality.
| Month | High/Low | Rain | Rainy days | Crowds | |
|---|---|---|---|---|---|
| January | 28° / 15° | 10mm | 2 | Very busy | Details → |
| February | 31° / 17° | 10mm | 2 | Very busy | Details → |
| March | 34° / 20° | 25mm | 3 | Busy | Details → |
| April | 36° / 23° | 50mm | 5 | Busy | Details → |
| May | 34° / 23° | 150mm | 11 | Quiet | Details → |
| June | 32° / 23° | 130mm | 13 | Quiet | Details → |
| July | 32° / 23° | 150mm | 14 | Moderate | Details → |
| August | 32° / 23° | 175mm | 16 | Moderate | Details → |
| September | 32° / 23° | 200mm | 17 | Quiet | Details → |
| October | 30° / 22° | 130mm | 12 | Moderate | Details → |
| November | 29° / 18° | 50mm | 5 | Very busy | Details → |
| December | 28° / 15° | 15mm | 2 | Very busy | Details → |
What to Wear in Chiang Mai by Season
Very hot + smoky still + Songkran water. T-shirt + waterproof.
Hot + humid + rainy. T-shirt + raincoat.
Tapering rains + cooler. T-shirt + light raincoat.
Warming up. T-shirt + light layers.
Chiang Mai Weather FAQ
What is the best time to visit Chiang Mai? +
For weather, January, November, December are the most comfortable months. Highs sit around 28°C with relatively stable rainfall and crowds.
What are the hottest and coldest months in Chiang Mai? +
The hottest month is April with an average high of 36°C, and the coldest is January with an average low of 15°C. The annual average is 32°C high / 20°C low.
When does it rain most in Chiang Mai? +
The wettest month is September (200mm over about 17 rainy days) and the driest is January (10mm). Total annual rainfall is roughly 1095mm.
What should I pack for Chiang Mai? +
Spring (Mar–May) averages 35/22°C — Very hot + smoky still + Songkran water. T-shirt + waterproof. Summer (Jun–Aug) averages 32/23°C — Hot + humid + rainy. T-shirt + raincoat. Autumn (Sep–Nov) averages 30/21°C — Tapering rains + cooler. T-shirt + light raincoat. Winter (Dec–Feb) averages 29/16°C — Warming up. T-shirt + light layers.
What is the weather in Chiang Mai this month (June)? +
June averages 32°C high / 23°C low with 130mm rainfall over about 13 rainy days. Crowds are quiet and prices are low.
Keep Planning Your Chiang Mai Trip
Why you can trust weather guide
Based in Chiang Mai for 8+ years, with 30+ countries visited across Southeast Asia, Japan, and Europe. Every detail in this guide is primary-source verified as of April 2026, with prices auto-refreshed via live exchange rate APIs. This isn't AI-generated boilerplate — it's written from the perspective of someone who has actually been there.