Climate averages 1991–2020
Chiang Mai weather
in January.
A hot, very dry month: the 11th warmest and the 2nd driest of the year. Meets the pleasant-weather rule
Long-term climate patterns, not a forecast for a particular trip.
January is a hot month in Chiang Mai: daytime highs average 28.1°C and nights cool to about 16.2°C. By daytime temperature it is the 11th warmest of the 12 months.
Expect about 6.7 mm of rain on roughly 1 day, which makes January a very dry month (the 2nd driest of the 12 months). Daylight, from sunrise to sunset, lasts about 11 h 08 min on an average January day.
The nearest other city in this atlas is Lampang (77 km away). In January its highs average 28.8°C, 0.7°C warmer than Chiang Mai, with 11 mm of rain.
Among the 46 cities listed in Thailand, Chiang Mai ranks 42nd of 46 for the warmest January highs and joint 3rd of 46 for the driest January (rainfall, lowest first). The mean January high of those 46 cities is 30.2°C; Chiang Mai is 2.1°C cooler than that mean.
From January to February, average highs rise by 3.2°C to 31.3°C, and monthly rainfall falls from 6.7 mm to 3.3 mm.
The annual picture
January 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, selected | 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 | 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
January in nearby cities
- Lampang in JanuaryThailand · 77 kmHigh 28.8°C · Low 17.7°C · 11 mm rain
- Chiang Rai in JanuaryThailand · 153 kmHigh 26.6°C · Low 15.0°C · 22 mm rain
- Nyaunglebin in JanuaryMyanmar · 256 kmHigh 29.7°C · Low 16.4°C · 3.7 mm rain
- Taungoo in JanuaryMyanmar · 269 kmHigh 29.2°C · Low 16.0°C · 8.1 mm rain
- Thaton in JanuaryMyanmar · 269 kmHigh 30.6°C · Low 19.6°C · 6.2 mm rain
- Mawlamyine in JanuaryMyanmar · 293 kmHigh 30.6°C · Low 20.5°C · 8.7 mm rain
- Yawnghwe in JanuaryMyanmar · 299 kmHigh 24.4°C · Low 13.1°C · 11 mm rain
- Taunggyi in JanuaryMyanmar · 301 kmHigh 21.2°C · Low 9.3°C · 11 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.