Weather in Luang Prabang in December

Prime time. December is about as good as Luang Prabang gets. Highs average 28.5 °C, lows 15.5 °C, and rain falls on 2 days — nothing in the month is working against you.

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

Rain falls on only 2 days, so an itinerary with no wet-weather fallback is a reasonable risk. Pack for 28.5 °C days and 15.5 °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: 12 days top 30 °C — hot spells arrive, but they break. Across the twenty years measured, the hottest December day reached 35.1 °C and the coldest night fell to 5.1 °C, and the wettest single day dropped 25 mm — roughly 208% of the month's rain in one day.

This is the volatile part. December rainfall has ranged from 0 mm to 72 mm across the twenty years measured — a 72 mm spread around an average of 12 mm. The average is real but almost no individual December looks like it, so treat the figure as the middle of a wide range rather than a forecast.

Wind is light at 1 km/h, so the temperature on the page is close to the temperature on your skin, and humidity is unremarkable at 68%.

How December sits in the year

Temperatures hold steady either side: 30.8 °C in November, 28.5 here, 29.3 in January. Nothing about the timing within the month matters much.

Daylight in December

December sits at the dark end of Luang Prabang's year — 10.9 hours of daylight against 13.3 at midsummer, holding steady all month. Sightseeing days are genuinely shorter, and an itinerary built for summer will not fit.

An inland climate

Despite being inland, the year stays fairly even: 20.7 °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 Luang Prabang versus nearby

If Luang Prabang is one option among several, the nearby comparison is worth making. Udon Thani is close enough to be a coin toss — within a degree on temperature, 1 day less rain. Sa Pa is the weaker option in December — 13.5 °C cooler, 3 days more rain.

So: December is the answer for Luang Prabang. If it is booked out or priced out, January is the next best thing at 4 points behind, and May is the month to keep off the shortlist.

Every month in Luang Prabang

See all twelve months in Luang Prabang, or where else to go in December.