Climate averages 1991–2020
Chiang Mai weather
in April.
A very hot, fairly dry month: the warmest and the 6th driest of the year.
Long-term climate patterns, not a forecast for a particular trip.
April is a very hot month in Chiang Mai: daytime highs average 35.8°C and nights cool to about 24.5°C. By daytime temperature it is the warmest month of the year.
Expect about 26 mm of rain on roughly 4 days, which makes April a fairly dry month (the 6th driest of the 12 months). Daylight, from sunrise to sunset, lasts about 12 h 34 min on an average April day.
The nearest other city in this atlas is Lampang (77 km away). In April its highs average 35.9°C, about as warm as Chiang Mai, with 47 mm of rain.
Among the 46 cities listed in Thailand, Chiang Mai ranks joint 3rd of 46 for the warmest April highs and 1st of 46 for the driest April (rainfall, lowest first). The mean April high of those 46 cities is 33.9°C; Chiang Mai is 1.9°C warmer than that mean.
From April to May, average highs fall by 2.7°C to 33.1°C, and monthly rainfall rises from 26 mm to 99 mm.
The annual picture
April 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, selected | 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
April in nearby cities
- Lampang in AprilThailand · 77 kmHigh 35.9°C · Low 24.9°C · 47 mm rain
- Chiang Rai in AprilThailand · 153 kmHigh 33.6°C · Low 22.4°C · 132 mm rain
- Nyaunglebin in AprilMyanmar · 256 kmHigh 37.0°C · Low 25.0°C · 29 mm rain
- Taungoo in AprilMyanmar · 269 kmHigh 37.3°C · Low 25.0°C · 24 mm rain
- Thaton in AprilMyanmar · 269 kmHigh 34.5°C · Low 25.8°C · 68 mm rain
- Mawlamyine in AprilMyanmar · 293 kmHigh 33.7°C · Low 25.5°C · 65 mm rain
- Yawnghwe in AprilMyanmar · 299 kmHigh 31.6°C · Low 20.0°C · 28 mm rain
- Taunggyi in AprilMyanmar · 301 kmHigh 28.4°C · Low 16.4°C · 28 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.