Climate averages 1991–2020
Vientiane weather
in March.
A hot, fairly dry month: the 2nd warmest and the 5th driest of the year.
Long-term climate patterns, not a forecast for a particular trip.
March is a hot month in Vientiane: daytime highs average 32.6°C and nights cool to about 22.1°C. By daytime temperature it is the 2nd warmest of the 12 months.
Expect about 36 mm of rain on roughly 6 days, which makes March a fairly dry month (the 5th driest of the 12 months). Daylight, from sunrise to sunset, lasts about 12 h 02 min on an average March day.
The nearest other city in this atlas is Udon Thani (64 km away). In March its highs average 33.1°C, about as warm as Vientiane, with 31 mm of rain.
Among the 4 cities listed in Laos, Vientiane ranks 3rd of 4 for the warmest March highs and 4th of 4 for the driest March (rainfall, lowest first). The mean March high of those 4 cities is 32.9°C; Vientiane is 0.3°C cooler than that mean.
From March to April, average highs rise by 1.2°C to 33.8°C, and monthly rainfall rises from 36 mm to 75 mm.
The annual picture
March 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 | 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, selected | 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
March in nearby cities
- Udon Thani in MarchThailand · 64 kmHigh 33.1°C · Low 22.3°C · 31 mm rain
- Khon Kaen in MarchThailand · 171 kmHigh 34.0°C · Low 23.2°C · 34 mm rain
- Sakon Nakhon in MarchThailand · 187 kmHigh 32.7°C · Low 22.2°C · 38 mm rain
- Thakhèk in MarchLaos · 244 kmHigh 32.4°C · Low 21.0°C · 34 mm rain
- Savannakhet in MarchLaos · 277 kmHigh 32.9°C · Low 22.0°C · 34 mm rain
- Lampang in MarchThailand · 330 kmHigh 34.9°C · Low 22.7°C · 22 mm rain
- Vinh in MarchVietnam · 336 kmHigh 25.6°C · Low 19.9°C · 37 mm rain
- Nakhon Ratchasima in MarchThailand · 337 kmHigh 34.3°C · Low 23.5°C · 38 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.