Weather in Nha Trang in December

Shoulder season. December sits in between. You will get good days and you will lose some. You should expect rain on 17 days of the month, which is more days wet than dry.

December ranks 5 of 12 in Nha Trang: past the worst of the year but short of February, which is the month to book if the dates are open.

Rain on 17 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 85% 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 — 1.5 °C between the overnight low and the afternoon high. Across the twenty years measured, the hottest December day reached 28.9 °C and the coldest night fell to 21.1 °C, and the wettest single day dropped 106 mm — roughly 72% of the month's rain in one day.

This is the volatile part. December rainfall has ranged from 16 mm to 715 mm across the twenty years measured — a 699 mm spread around an average of 148 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 sits around 24.4 km/h — a steady breeze rather than a nuisance, and welcome on the warmer days, and humidity at 85% is the real story though — it is the number that decides how the day feels, not the 26.1 °C.

How December sits in the year

Temperatures hold steady either side: 27.4 °C in November, 26.1 here, 25.4 in January. Nothing about the timing within the month matters much. Rain is the thing that moves: January brings 8 days less of it, so pushing the dates later buys drier weather.

Daylight in December

Nha Trang sits close enough to the equator that daylight barely moves all year — 11.4 hours in December, against a range of just 1.4 hours across the whole calendar. Sunrise and sunset land at roughly the same time whenever you come.

Sea temperature

The sea sits at about 26 °C in December — warm enough to stay in as long as you like. The sea peaks at 29.3 °C in May and bottoms out at 25.3 °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

Shoulder. The value months — prices ease off and you get the place closer to itself.

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

December in Nha Trang versus nearby

If Nha Trang is one option among several, the nearby comparison is worth making. Qui Nhon is close enough to be a coin toss — within a degree on temperature, the same number of rain days. Vũng Tàu is a better bet in December — 3.6 °C warmer, 10 days less rain.

So: December is a compromise. February is 30 points better and is what Nha Trang 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 Nha Trang

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