Weather in Nha Trang in January

Prime time. If you get to pick your dates, January is the one. Highs average 25.4 °C, lows 23.6 °C, and rain falls on 9 days — nothing in the month is working against you.

January ranks 3 of 12 in Nha Trang. Only February scores clearly higher, and the difference is small enough to be settled by price rather than weather.

Rain on 9 days, 1 of them heavy. Enough to need a plan B, not enough to need a plan around it. Nothing specialised needed — this is the month you pack for the trip rather than for the weather.

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 January reaches 30 °C; the day barely swings — 1.8 °C between the overnight low and the afternoon high. Across the twenty years measured, the hottest January day reached 27.9 °C and the coldest night fell to 20.9 °C, and the wettest single day dropped 45 mm — roughly 94% of the month's rain in one day.

This is the volatile part. January rainfall has ranged from 6 mm to 190 mm across the twenty years measured — a 184 mm spread around an average of 48 mm. The average is real but almost no individual January looks like it, so treat the figure as the middle of a wide range rather than a forecast.

Wind sits around 22.2 km/h — a steady breeze rather than a nuisance, and welcome on the warmer days, and humidity runs at 83%, high enough to notice on the warm days without dominating them.

How January sits in the year

Temperatures hold steady either side: 26.1 °C in December, 25.4 here, 26.1 in February. Nothing about the timing within the month matters much. Rain is the thing that moves: February brings 6 days less of it, so pushing the dates later buys drier weather.

Daylight in January

Nha Trang sits close enough to the equator that daylight barely moves all year — 11.5 hours in January, 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 25.3 °C in January — 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

Busy. Popular without being frantic; book the things you care about, improvise the rest.

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

January 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 close enough to be a coin toss — 5.4 °C warmer, 6 days less rain.

So: January works, with February the better month by 9 points if the dates can move. If they cannot, nothing here should stop you booking.

Every month in Nha Trang

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