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Chiang Mai Weather by Month
Average temperatures, rainfall and humidity for Chiang Mai, Thailand, month by month, built from OpenWeather's historical records. Use it to see what a typical Chiang Mai month looks like before you travel — then check the live Chiang Mai forecast for the days ahead.
Warmest month
April
37°C average high
Coolest month
January
16°C average low
Wettest month
August
110 mm of rain
Driest month
February
3 mm of rain
Average temperature and rainfall in Chiang Mai by month
Averages of the daily highs and lows recorded in each month, with total rainfall, mean humidity and mean wind speed.
| Month | Avg high | Avg low | Record low / high | Rainfall | Humidity | Wind |
|---|---|---|---|---|---|---|
| January | 29°C | 16°C | 9°C / 35°C | 13 mm | 67% | 5 km/h |
| February | 33°C | 18°C | 8°C / 38°C | 3 mm | 56% | 6 km/h |
| March | 36°C | 21°C | 15°C / 42°C | 23 mm | 49% | 6 km/h |
| April | 37°C | 24°C | 16°C / 44°C | 39 mm | 53% | 8 km/h |
| May | 35°C | 25°C | 19°C / 42°C | 77 mm | 66% | 8 km/h |
| June | 33°C | 25°C | 21°C / 39°C | 90 mm | 73% | 7 km/h |
| July | 32°C | 25°C | 21°C / 39°C | 78 mm | 76% | 7 km/h |
| August | 32°C | 24°C | 20°C / 38°C | 110 mm | 79% | 7 km/h |
| September | 32°C | 24°C | 17°C / 37°C | 92 mm | 80% | 6 km/h |
| October | 31°C | 22°C | 17°C / 45°C | 47 mm | 78% | 6 km/h |
| November | 31°C | 21°C | 11°C / 34°C | 14 mm | 74% | 6 km/h |
| December | 29°C | 18°C | 9°C / 33°C | 11 mm | 71% | 5 km/h |
Best time to visit Chiang Mai
The most comfortable time to visit Chiang Mai is generally November to January, balancing mild daytime temperatures against the driest stretch of the year. Temperatures stay fairly even all year and rain concentrates around August, totalling about 597 mm a year.
Travellers who prefer heat should aim for April, when highs average 37°C. August is the month to avoid if rain would spoil your plans — it averages 110 mm, roughly 33× the rainfall of February.
Source: OpenWeather historical and statistical weather data. Values are long-term averages, not a forecast — see the Chiang Mai forecast for what is happening now.