Climate averages 1991–2020
Vientiane weather
in January.
A warm, 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 warm month in Vientiane: daytime highs average 27.3°C and nights cool to about 17.0°C. By daytime temperature it is the 11th warmest of the 12 months.
Expect about 11 mm of rain on roughly 2 days, which makes January a very dry month (the 2nd driest of the 12 months). Daylight, from sunrise to sunset, lasts about 11 h 11 min on an average January day.
The nearest other city in this atlas is Udon Thani (64 km away). In January its highs average 28.0°C, 0.7°C warmer than Vientiane, with 7.6 mm of rain.
Among the 4 cities listed in Laos, Vientiane ranks 4th of 4 for the warmest January highs and 4th of 4 for the driest January (rainfall, lowest first). The mean January high of those 4 cities is 28.6°C; Vientiane is 1.3°C cooler than that mean.
From January to February, average highs rise by 2.5°C to 29.8°C, and monthly rainfall rises from 11 mm to 15 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
Vientiane climate table
| Month | Average highHigh / low | Average low | Rainfall mm/month | Rain days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January, selected | 27.3°C17.0°C | 17.0°C | 11 | 1.8 | 11.211 h |
| February | 29.8°C18.9°C | 18.9°C | 15 | 2.2 | 11.512 h |
| March | 32.6°C22.1°C | 22.1°C | 36 | 6.2 | 12.012 h |
| April | 33.8°C24.4°C | 24.4°C | 75 | 11.9 | 12.513 h |
| May | 31.9°C24.7°C | 24.7°C | 261 | 23.4 | 13.013 h |
| June | 30.5°C24.7°C | 24.7°C | 316 | 25.0 | 13.213 h |
| July | 29.9°C24.4°C | 24.4°C | 372 | 26.5 | 13.113 h |
| August | 29.6°C24.1°C | 24.1°C | 401 | 27.4 | 12.713 h |
| September | 29.6°C23.8°C | 23.8°C | 300 | 24.7 | 12.312 h |
| October | 29.3°C22.7°C | 22.7°C | 101 | 11.9 | 11.712 h |
| November | 28.7°C20.2°C | 20.2°C | 22 | 3.0 | 11.311 h |
| December | 26.9°C17.3°C | 17.3°C | 8.4 | 1.2 | 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
January in nearby cities
- Udon Thani in JanuaryThailand · 64 kmHigh 28.0°C · Low 17.1°C · 7.6 mm rain
- Khon Kaen in JanuaryThailand · 171 kmHigh 29.3°C · Low 18.1°C · 7.2 mm rain
- Sakon Nakhon in JanuaryThailand · 187 kmHigh 28.2°C · Low 17.0°C · 6.5 mm rain
- Thakhèk in JanuaryLaos · 244 kmHigh 28.2°C · Low 16.0°C · 6.0 mm rain
- Savannakhet in JanuaryLaos · 277 kmHigh 28.5°C · Low 17.3°C · 4.4 mm rain
- Lampang in JanuaryThailand · 330 kmHigh 28.8°C · Low 17.7°C · 11 mm rain
- Vinh in JanuaryVietnam · 336 kmHigh 20.6°C · Low 16.0°C · 30 mm rain
- Nakhon Ratchasima in JanuaryThailand · 337 kmHigh 29.9°C · Low 18.9°C · 6.7 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 Vientiane) is explained once on the Vientiane year overview and on the Sources, method and limits page.