Weather in Ubon Ratchathani in December

Prime time. If you get to pick your dates, December is the one. Highs average 31.5 °C, lows 19 °C, and rain falls on 1 days — nothing in the month is working against you.

December is the highest-scoring month of the twelve. The nearest rival is November, and the month at the other end of the year is May.

Rain falls on only 1 days, so an itinerary with no wet-weather fallback is a reasonable risk. Pack for 31.5 °C days and 19 °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: 22 days top 30 °C, making the heat continuous rather than occasional. Across the twenty years measured, the hottest December day reached 36.9 °C and the coldest night fell to 10.9 °C, and the wettest single day dropped 44 mm — roughly 629% of the month's rain in one day.

December is dependably dry, and that reliability is the point: across the twenty years measured, the wettest December on record still only managed 95 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 Decembers brought 44 mm. Rain simply is not the variable that decides this trip — heat, crowds and cost are.

Wind is light at 10.1 km/h, so the temperature on the page is close to the temperature on your skin, and humidity is unremarkable at 67%.

How December sits in the year

Temperatures hold steady either side: 30.3 °C in November, 31.5 here, 33.3 in January. Nothing about the timing within the month matters much.

Daylight in December

Ubon Ratchathani sits close enough to the equator that daylight barely moves all year — 11.2 hours in December, 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

Peak season. Expect the highest prices of the year and to be booking well ahead.

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

December 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 a better bet in December — 2.3 °C cooler, the same number of rain days.

So: December is the answer for Ubon Ratchathani. If it is booked out or priced out, November is the next best thing at 1 points behind, and May is the month to keep off the shortlist.

Every month in Ubon Ratchathani

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