Weather in Hoi An in January

A good month. January works. It is not the peak, but nothing about it fights you. Highs average 24.8 °C, lows 20 °C, and rain falls on 13 days — nothing in the month is working against you.

January ranks 2 of 12 in Hoi An. Only February scores clearly higher, and the difference is small enough to be settled by price rather than weather.

Rain on 13 days, 2 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 — 4.9 °C between the overnight low and the afternoon high. Across the twenty years measured, the hottest January day reached 31.8 °C and the coldest night fell to 15.1 °C, and the wettest single day dropped 49 mm — roughly 62% of the month's rain in one day.

January is moderately variable: 20 mm in the driest year against 205 mm in the wettest, around an average of 79 mm. Roughly two Januarys in three land near that average, and the third does something else entirely.

Wind is light at 8.3 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 24.8 °C.

How January sits in the year

Temperatures hold steady either side: 25.3 °C in December, 24.8 here, 26.3 in February. Nothing about the timing within the month matters much. Rain is the thing that moves: February brings 7 days less of it, so pushing the dates later buys drier weather.

Daylight in January

Hoi An sits close enough to the equator that daylight barely moves all year — 11.3 hours in January, against a range of just 1.9 hours across the whole calendar. Sunrise and sunset land at roughly the same time whenever you come.

Sea temperature

The sea sits at about 24.2 °C in January — warm enough to stay in as long as you like. The sea peaks at 29.9 °C in June and bottoms out at 24.1 °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 Hoi An versus nearby

If Hoi An 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, 4 days less rain. Ubon Ratchathani is close enough to be a coin toss — 8.5 °C warmer, 12 days less rain.

So: January works, with February the better month by 8 points if the dates can move. If they cannot, nothing here should stop you booking.

Every month in Hoi An

See all twelve months in Hoi An, or where else to go in January.