Climate averages 1991–2020
Chiang Mai weather
in August.
A hot, very wet month: the 8th warmest and the wettest of the year.
Long-term climate patterns, not a forecast for a particular trip.
August is a hot month in Chiang Mai: daytime highs average 29.1°C and nights cool to about 23.4°C. By daytime temperature it is the 8th warmest of the 12 months.
Expect about 236 mm of rain on roughly 25 days, which makes August a very wet month (the wettest month of the year). Daylight, from sunrise to sunset, lasts about 12 h 46 min on an average August day.
The nearest other city in this atlas is Lampang (77 km away). In August its highs average 29.0°C, about as warm as Chiang Mai, with 272 mm of rain.
Among the 46 cities listed in Thailand, Chiang Mai ranks 43rd of 46 for the warmest August highs and 37th of 46 for the driest August (rainfall, lowest first). The mean August high of those 46 cities is 30.7°C; Chiang Mai is 1.6°C cooler than that mean.
From August to September, average highs rise by 0.1°C to 29.3°C, and monthly rainfall falls from 236 mm to 227 mm.
The annual picture
August in context
Monthly rainfall
Average total · mmAverages from hourly ERA5 reanalysis data. Actual weather varies from year to year. How these numbers are calculated
Every month, side by side
Chiang Mai climate table
| Month | Average highHigh / low | Average low | Rainfall mm/month | Rain days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | 28.1°C16.2°C | 16.2°C | 6.7 | 1.3 | 11.111 h |
| February | 31.3°C18.4°C | 18.4°C | 3.3 | 0.7 | 11.512 h |
| March | 34.3°C21.7°C | 21.7°C | 12 | 2.1 | 12.012 h |
| April | 35.8°C24.5°C | 24.5°C | 26 | 4.3 | 12.613 h |
| May | 33.1°C24.6°C | 24.6°C | 99 | 13.1 | 13.013 h |
| June | 30.9°C24.1°C | 24.1°C | 120 | 18.3 | 13.213 h |
| July | 29.9°C23.8°C | 23.8°C | 175 | 21.9 | 13.113 h |
| August, selected | 29.1°C23.4°C | 23.4°C | 236 | 25.0 | 12.813 h |
| September | 29.3°C22.9°C | 22.9°C | 227 | 23.4 | 12.312 h |
| October | 28.9°C21.5°C | 21.5°C | 114 | 15.7 | 11.712 h |
| November | 28.3°C18.8°C | 18.8°C | 21 | 4.0 | 11.311 h |
| December | 27.1°C16.0°C | 16.0°C | 9.1 | 1.2 | 11.011 h |
Rainfall is the average of the 30 separate monthly totals. A rain day is a local calendar day with at least 1 mm of precipitation. Daylight is the calculated sunrise-to-sunset length, not measured sunshine.
Compare places
August in nearby cities
- Lampang in AugustThailand · 77 kmHigh 29.0°C · Low 23.4°C · 272 mm rain
- Chiang Rai in AugustThailand · 153 kmHigh 29.2°C · Low 23.2°C · 383 mm rain
- Nyaunglebin in AugustMyanmar · 256 kmHigh 28.3°C · Low 23.7°C · 469 mm rain
- Taungoo in AugustMyanmar · 269 kmHigh 28.0°C · Low 23.4°C · 405 mm rain
- Thaton in AugustMyanmar · 269 kmHigh 27.6°C · Low 24.0°C · 845 mm rain
- Mawlamyine in AugustMyanmar · 293 kmHigh 27.3°C · Low 24.1°C · 713 mm rain
- Yawnghwe in AugustMyanmar · 299 kmHigh 25.9°C · Low 20.6°C · 194 mm rain
- Taunggyi in AugustMyanmar · 301 kmHigh 23.0°C · Low 17.5°C · 194 mm rain
Read the numbers correctly
Climate, not a promise.
These patterns help compare months. They cannot tell you the weather on a specific day of your trip.
Sources, method and limitsHow these numbers are made (what the highs, lows and rain days mean, the sources and the model cell used for Chiang Mai) is explained once on the Chiang Mai year overview and on the Sources, method and limits page.