Weather in Ubon Ratchathani in August

A hard month. August is a hard month in Ubon Ratchathani, and worth planning around. You should expect rain on 26 days of the month, which is more days wet than dry.

August ranks 6 of 12 in Ubon Ratchathani: past the worst of the year but short of December, which is the month to book if the dates are open.

Rain on 26 of the month's 31 days, 11 of them heavy. At that frequency a wet-weather backup is not a contingency, it is the itinerary — book the indoor things first and treat the clear days as the bonus. Natural fibres and a second shirt for the day. At 89% nothing dries, including you.

What the averages hide

Averages flatten a month, and this one hides a few things: 9 days top 30 °C — hot spells arrive, but they break; the day barely swings — 5.4 °C between the overnight low and the afternoon high. Across the twenty years measured, the hottest August day reached 33.3 °C and the coldest night fell to 21.3 °C, and the wettest single day dropped 79 mm — roughly 26% of the month's rain in one day.

August is statistically steady but not small: the year-to-year variation is modest in relative terms, yet the wettest August on record still delivered 495 mm against 197 mm in the driest. In a month this wet, even a tame spread is a lot of rain in absolute terms — the 299 mm average is a reasonable planning figure, not a promise.

Wind is light at 7.4 km/h, so the temperature on the page is close to the temperature on your skin, and humidity at 89% is the real story though — it is the number that decides how the day feels, not the 29.3 °C.

How August sits in the year

Temperatures hold steady either side: 29.7 °C in July, 29.3 here, 29.4 in September. Nothing about the timing within the month matters much.

Daylight in August

Ubon Ratchathani sits close enough to the equator that daylight barely moves all year — 12.7 hours in August, against a range of just 1.8 hours across the whole calendar. Sunrise and sunset land at roughly the same time whenever you come.

An inland climate

Despite being inland, the year stays fairly even: 17.8 °C between the year's warmest afternoons and coldest nights.

How busy it gets

Shoulder. The value months — prices ease off and you get the place closer to itself.

Crowd levels are estimated from climate desirability and school-holiday calendars, not from visitor numbers.

August in Ubon Ratchathani versus nearby

If Ubon Ratchathani is one option among several, the nearby comparison is worth making. Siem Reap is close enough to be a coin toss — within a degree on temperature, 2 days less rain. Nakhon Ratchasima is close enough to be a coin toss — within a degree on temperature, 3 days less rain.

So: August is a compromise. December is 31 points better and is what Ubon Ratchathani is actually like at its best — worth moving the trip for if that is possible, and worth adjusting expectations for if it is not.

Every month in Ubon Ratchathani

See all twelve months in Ubon Ratchathani, or where else to go in August.