Weather in Ubon Ratchathani in April

A hard month. April asks something of you. Go in knowing what. Daytime highs average 36.6 °C and the afternoon is not negotiable — outdoor plans move to early morning or evening.

April ranks 11 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 11 days, 2 of them heavy. Enough to need a plan B, not enough to need a plan around it. Pack for heat management rather than style: shade, water, and a schedule that gives up on the middle of the day.

What the averages hide

Averages flatten a month, and this one hides a few things: 22 days of the month clear 35 °C — that is not a heatwave, it is the month. Across the twenty years measured, the hottest April day reached 43.9 °C and the coldest night fell to 17.3 °C, and the wettest single day dropped 51 mm — roughly 70% of the month's rain in one day.

April is moderately variable: 25 mm in the driest year against 171 mm in the wettest, around an average of 73 mm. Roughly two Aprils in three land near that average, and the third does something else entirely.

Wind is light at 6.6 km/h, so the temperature on the page is close to the temperature on your skin, and humidity is unremarkable at 56%.

How April sits in the year

Temperatures hold steady either side: 36.8 °C in March, 36.6 here, 33.4 in May. Nothing about the timing within the month matters much. Rain is the thing that moves: May brings 10 days more of it, so the earlier half of a flexible trip is the safer half.

Daylight in April

Ubon Ratchathani sits close enough to the equator that daylight barely moves all year — 12.5 hours in April, 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.

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

So: April is a compromise. December is 42 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 April.