Weather in Ubon Ratchathani in June

A hard month. June is a hard month in Ubon Ratchathani, and worth planning around. You should expect rain on 22 days of the month, which is more days wet than dry.

June ranks 10 of 12 — near the bottom of Ubon Ratchathani's year. December is the month that works, and the swing between the two is 42 points, which is a different holiday rather than a slightly better one.

Rain on 22 of the month's 30 days, 6 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 84% nothing dries, including you.

What the averages hide

Averages flatten a month, and this one hides a few things: 20 days top 30 °C, making the heat continuous rather than occasional. Across the twenty years measured, the hottest June day reached 38.8 °C and the coldest night fell to 22.3 °C, and the wettest single day dropped 59 mm — roughly 29% of the month's rain in one day.

June is statistically steady but not small: the year-to-year variation is modest in relative terms, yet the wettest June on record still delivered 348 mm against 99 mm in the driest. In a month this wet, even a tame spread is a lot of rain in absolute terms — the 202 mm average is a reasonable planning figure, not a promise.

Wind is light at 7.3 km/h, so the temperature on the page is close to the temperature on your skin, and humidity runs at 84%, high enough to notice on the warm days without dominating them.

How June sits in the year

Temperatures hold steady either side: 33.4 °C in May, 30.9 here, 29.7 in July. Nothing about the timing within the month matters much.

Daylight in June

Ubon Ratchathani sits close enough to the equator that daylight barely moves all year — 13 hours in June, 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

Off season. The genuine off season: cheapest by a distance, with the caveat that some tours and restaurants close entirely.

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

June 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, 1 day more rain. Nakhon Ratchasima is close enough to be a coin toss — within a degree on temperature, 2 days less rain.

So: June is a compromise. December is 34 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 June.