Weather in Krabi in December

Shoulder season. December is shoulder season in Krabi — cheaper, quieter, and a genuine gamble. The heat itself is manageable at 28.3 °C, but 87% humidity is what you will actually feel.

December ranks 7 of 12 in Krabi: past the worst of the year but short of February, which is the month to book if the dates are open.

Rain on 18 days, 4 of them heavy. Enough to need a plan B, not enough to need a plan around it. Natural fibres and a second shirt for the day. At 87% nothing dries, including you.

What the averages hide

Averages flatten a month, and this one hides a few things: it never really gets hot: not one day in an average December reaches 30 °C; the day barely swings — 3.6 °C between the overnight low and the afternoon high. Across the twenty years measured, the hottest December day reached 30.1 °C and the coldest night fell to 21.7 °C, and the wettest single day dropped 66 mm — roughly 47% of the month's rain in one day.

December is moderately variable: 49 mm in the driest year against 359 mm in the wettest, around an average of 139 mm. Roughly two Decembers in three land near that average, and the third does something else entirely.

Wind is light at 6.9 km/h, so the temperature on the page is close to the temperature on your skin, and humidity at 87% is the real story though — it is the number that decides how the day feels, not the 28.3 °C.

How December sits in the year

Temperatures hold steady either side: 28.6 °C in November, 28.3 here, 28.5 in January. Nothing about the timing within the month matters much. Rain is the thing that moves: January brings 7 days less of it, so pushing the dates later buys drier weather.

Daylight in December

Krabi sits close enough to the equator that daylight barely moves all year — 11.7 hours in December, against a range of just 0.9 hours across the whole calendar. Sunrise and sunset land at roughly the same time whenever you come.

Sea temperature

The sea sits at about 29 °C in December — warm enough that the water offers no relief from the heat. The sea peaks at 30.4 °C in May and bottoms out at 28.6 °C — water lags the air by a month or two, which is why the best swimming often comes after the best weather.

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.

December in Krabi versus nearby

If Krabi is one option among several, the nearby comparison is worth making. Surat Thani is close enough to be a coin toss — within a degree on temperature, 1 day more rain. Hat Yai is close enough to be a coin toss — within a degree on temperature, 4 days more rain.

So: December is a compromise. February is 26 points better and is what Krabi 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 Krabi

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