Climate averages 1991–2020
Udon Thani weather
in May.
A hot, very wet month: the 3rd warmest and the 8th driest of the year.
Long-term climate patterns, not a forecast for a particular trip.
May is a hot month in Udon Thani: daytime highs average 32.6°C and nights cool to about 25.1°C. By daytime temperature it is the 3rd warmest of the 12 months.
Expect about 211 mm of rain on roughly 22 days, which makes May a very wet month (the 8th driest of the 12 months). Daylight, from sunrise to sunset, lasts about 12 h 56 min on an average May day.
The nearest other city in this atlas is Vientiane (64 km away). In May its highs average 31.9°C, 0.7°C cooler than Udon Thani, with 261 mm of rain.
Among the 46 cities listed in Thailand, Udon Thani ranks joint 29th of 46 for the warmest May highs and 41st of 46 for the driest May (rainfall, lowest first). The mean May high of those 46 cities is 32.7°C; Udon Thani is 0.1°C cooler than that mean.
From May to June, average highs fall by 1.2°C to 31.4°C, and monthly rainfall rises from 211 mm to 221 mm.
The annual picture
May 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, selected | 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 | 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
May in nearby cities
- Vientiane in MayLaos · 64 kmHigh 31.9°C · Low 24.7°C · 261 mm rain
- Khon Kaen in MayThailand · 108 kmHigh 33.4°C · Low 25.4°C · 152 mm rain
- Sakon Nakhon in MayThailand · 147 kmHigh 32.2°C · Low 25.0°C · 216 mm rain
- Thakhèk in MayLaos · 217 kmHigh 31.5°C · Low 24.2°C · 253 mm rain
- Savannakhet in MayLaos · 230 kmHigh 32.1°C · Low 24.7°C · 189 mm rain
- Nakhon Ratchasima in MayThailand · 282 kmHigh 33.5°C · Low 25.2°C · 140 mm rain
- Ubon Ratchathani in MayThailand · 327 kmHigh 33.0°C · Low 25.4°C · 181 mm rain
- Vinh in MayVietnam · 338 kmHigh 32.1°C · Low 25.4°C · 99 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.