Weather in Ubon Ratchathani in January

A good month. January works. It is not the peak, but nothing about it fights you. Highs average 33.3 °C, lows 19.1 °C, and rain falls on 1 days — nothing in the month is working against you.

January ranks 3 of 12 in Ubon Ratchathani. Only December scores clearly higher, and the difference is small enough to be settled by price rather than weather.

Rain falls on only 1 days, so an itinerary with no wet-weather fallback is a reasonable risk. Pack for 33.3 °C days and 19.1 °C nights; the spread matters more here than any single number.

What the averages hide

Averages flatten a month, and this one hides a few things: 9 days clear 35 °C, so a serious heatwave is normal rather than notable. Across the twenty years measured, the hottest January day reached 38.5 °C and the coldest night fell to 10.6 °C.

January is dependably dry, and that reliability is the point: across the twenty years measured, the wettest January on record still only managed 30 mm, and the driest managed 0 mm. There is no meaningful variability to plan around, which makes this one of the few months anywhere that you can build a fixed outdoor itinerary against without a fallback. The wettest single day in twenty years of Januarys brought 13 mm. Rain simply is not the variable that decides this trip — heat, crowds and cost are.

Wind is light at 9.1 km/h, so the temperature on the page is close to the temperature on your skin, and humidity is unremarkable at 57%.

How January sits in the year

The month is on the way up: 1.8 °C warmer than December, and February adds another 2.3 °C. Late in the month feels noticeably different from the start of it, which is worth knowing if the trip is short.

Daylight in January

Ubon Ratchathani sits close enough to the equator that daylight barely moves all year — 11.3 hours in January, 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. Within January itself the daily swing is 14.3 °C, so mornings and afternoons need different clothes.

How busy it gets

Busy. Popular without being frantic; book the things you care about, improvise the rest.

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

January 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 a better bet in January — 2.4 °C cooler, 1 day more rain.

So: January works, with December the better month by 8 points if the dates can move. If they cannot, nothing here should stop you booking.

Every month in Ubon Ratchathani

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