Climate averages 1991–2020
Chiang Rai weather
in December.
A warm, fairly dry month: the coolest and the 3rd driest of the year. Meets the pleasant-weather rule
Long-term climate patterns, not a forecast for a particular trip.
December is a warm month in Chiang Rai: daytime highs average 25.5°C and nights cool to about 15.4°C. By daytime temperature it is the coolest month of the year.
Expect about 27 mm of rain on roughly 4 days, which makes December a fairly dry month (the 3rd driest of the 12 months). Daylight, from sunrise to sunset, lasts about 10 h 57 min on an average December day.
The nearest other city in this atlas is Chiang Mai (153 km away). In December its highs average 27.1°C, 1.5°C warmer than Chiang Rai, with 9.1 mm of rain.
Among the 46 cities listed in Thailand, Chiang Rai ranks 46th of 46 for the warmest December highs and 40th of 46 for the driest December (rainfall, lowest first). The mean December high of those 46 cities is 29.6°C; Chiang Rai is 4.1°C cooler than that mean.
From December to January, average highs rise by 1.1°C to 26.6°C, and monthly rainfall falls from 27 mm to 22 mm.
The annual picture
December 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 Rai climate table
| Month | Average highHigh / low | Average low | Rainfall mm/month | Rain days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | 26.6°C15.0°C | 15.0°C | 22 | 3.0 | 11.111 h |
| February | 30.0°C16.2°C | 16.2°C | 14 | 2.5 | 11.511 h |
| March | 33.0°C19.3°C | 19.3°C | 42 | 5.1 | 12.012 h |
| April | 33.6°C22.4°C | 22.4°C | 132 | 11.8 | 12.613 h |
| May | 31.5°C23.4°C | 23.4°C | 292 | 22.8 | 13.113 h |
| June | 30.4°C23.7°C | 23.7°C | 297 | 26.2 | 13.313 h |
| July | 29.5°C23.4°C | 23.4°C | 398 | 28.4 | 13.213 h |
| August | 29.2°C23.2°C | 23.2°C | 383 | 28.8 | 12.813 h |
| September | 29.0°C22.9°C | 22.9°C | 295 | 25.1 | 12.312 h |
| October | 28.4°C21.6°C | 21.6°C | 139 | 17.8 | 11.712 h |
| November | 27.2°C18.4°C | 18.4°C | 49 | 6.6 | 11.211 h |
| December, selected | 25.5°C15.4°C | 15.4°C | 27 | 3.7 | 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
December in nearby cities
- Chiang Mai in DecemberThailand · 153 kmHigh 27.1°C · Low 16.0°C · 9.1 mm rain
- Lampang in DecemberThailand · 183 kmHigh 27.8°C · Low 17.6°C · 12 mm rain
- Kēng Tung in DecemberMyanmar · 192 kmHigh 23.7°C · Low 13.4°C · 18 mm rain
- Möng Yang in DecemberMyanmar · 216 kmHigh 22.5°C · Low 11.7°C · 21 mm rain
- Yunjinghong in DecemberChina · 255 kmHigh 23.6°C · Low 13.3°C · 30 mm rain
- Menglang in DecemberChina · 295 kmHigh 21.4°C · Low 11.6°C · 25 mm rain
- Taunggyi in DecemberMyanmar · 307 kmHigh 20.8°C · Low 10.3°C · 11 mm rain
- Yawnghwe in DecemberMyanmar · 314 kmHigh 24.0°C · Low 14.0°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 Rai) is explained once on the Chiang Rai year overview and on the Sources, method and limits page.