Climate averages 1991–2020
Udon Thani weather
in December.
A warm, very dry month: the coolest and the 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 Udon Thani: daytime highs average 27.4°C and nights cool to about 17.3°C. By daytime temperature it is the coolest month of the year.
Expect about 6.4 mm of rain on fewer than one day, which makes December a very dry month (the driest month of the year). Daylight, from sunrise to sunset, lasts about 11 h 07 min on an average December day.
The nearest other city in this atlas is Vientiane (64 km away). In December its highs average 26.9°C, about as warm as Udon Thani, with 8.4 mm of rain.
Among the 46 cities listed in Thailand, Udon Thani ranks 43rd of 46 for the warmest December highs and 7th of 46 for the driest December (rainfall, lowest first). The mean December high of those 46 cities is 29.6°C; Udon Thani is 2.2°C cooler than that mean.
From December to January, average highs rise by 0.7°C to 28.0°C, and monthly rainfall rises from 6.4 mm to 7.6 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
Udon Thani climate table
| Month | Average highHigh / low | Average low | Rainfall mm/month | Rain days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | 28.0°C17.1°C | 17.1°C | 7.6 | 1.5 | 11.211 h |
| February | 30.5°C19.1°C | 19.1°C | 14 | 2.4 | 11.612 h |
| March | 33.1°C22.3°C | 22.3°C | 31 | 5.8 | 12.012 h |
| April | 34.3°C24.7°C | 24.7°C | 62 | 10.4 | 12.513 h |
| May | 32.6°C25.1°C | 25.1°C | 211 | 21.8 | 12.913 h |
| June | 31.4°C25.1°C | 25.1°C | 221 | 23.0 | 13.213 h |
| July | 30.6°C24.7°C | 24.7°C | 266 | 25.6 | 13.113 h |
| August | 30.1°C24.3°C | 24.3°C | 331 | 26.9 | 12.713 h |
| September | 29.9°C23.7°C | 23.7°C | 276 | 24.5 | 12.212 h |
| October | 29.4°C22.3°C | 22.3°C | 96 | 11.8 | 11.812 h |
| November | 28.9°C20.0°C | 20.0°C | 20 | 2.9 | 11.311 h |
| December, selected | 27.4°C17.3°C | 17.3°C | 6.4 | 0.9 | 11.111 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
- Vientiane in DecemberLaos · 64 kmHigh 26.9°C · Low 17.3°C · 8.4 mm rain
- Khon Kaen in DecemberThailand · 108 kmHigh 28.3°C · Low 18.3°C · 5.1 mm rain
- Sakon Nakhon in DecemberThailand · 147 kmHigh 27.6°C · Low 17.2°C · 5.5 mm rain
- Thakhèk in DecemberLaos · 217 kmHigh 27.7°C · Low 16.3°C · 5.8 mm rain
- Savannakhet in DecemberLaos · 230 kmHigh 27.7°C · Low 17.8°C · 4.9 mm rain
- Nakhon Ratchasima in DecemberThailand · 282 kmHigh 28.9°C · Low 19.1°C · 5.3 mm rain
- Ubon Ratchathani in DecemberThailand · 327 kmHigh 29.4°C · Low 19.5°C · 6.3 mm rain
- Vinh in DecemberVietnam · 338 kmHigh 21.2°C · Low 16.9°C · 47 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 Udon Thani) is explained once on the Udon Thani year overview and on the Sources, method and limits page.