Weather in Udon Thani in March

A hard month. March asks something of you. Go in knowing what. Daytime highs average 36 °C and the afternoon is not negotiable — outdoor plans move to early morning or evening.

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

Rain on 7 days, 1 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: 20 days of the month clear 35 °C — that is not a heatwave, it is the month. Across the twenty years measured, the hottest March day reached 42.6 °C and the coldest night fell to 10.8 °C, and the wettest single day dropped 26 mm — roughly 67% of the month's rain in one day.

March is moderately variable: 3 mm in the driest year against 96 mm in the wettest, around an average of 39 mm. Roughly two Marchs in three land near that average, and the third does something else entirely.

Wind is light at 7.8 km/h, so the temperature on the page is close to the temperature on your skin, and humidity is unremarkable at 49%.

How March sits in the year

Temperatures hold steady either side: 33.4 °C in February, 36 here, 37.3 in April. Nothing about the timing within the month matters much.

Daylight in March

12 hours of daylight, gaining 0.5 hours across the month. That is between Udon Thani's extremes of 13.2 and 11.1 hours, so days are long enough not to constrain the plan.

An inland climate

Despite being inland, the year stays fairly even: 21.9 °C between the year's warmest afternoons and coldest nights.

How busy it gets

Quiet. Few other visitors, cheaper rooms, and a real chance some seasonal operators are shut.

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

March in Udon Thani versus nearby

If Udon Thani is one option among several, the nearby comparison is worth making. Nakhon Ratchasima is close enough to be a coin toss — within a degree on temperature, 1 day more rain. Luang Prabang is close enough to be a coin toss — within a degree on temperature, 2 days less rain.

So: March is a compromise. December is 46 points better and is what Udon Thani 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 Udon Thani

See all twelve months in Udon Thani, or where else to go in March.