Weather in Haiphong in January

Prime time. January is about as good as Haiphong gets. Highs average 20.7 °C, lows 12.9 °C, and rain falls on 6 days — nothing in the month is working against you.

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

Rain falls on only 6 days, so an itinerary with no wet-weather fallback is a reasonable risk. 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. Across the twenty years measured, the hottest January day reached 29.1 °C and the coldest night fell to 3.9 °C, and the wettest single day dropped 68 mm — roughly 174% of the month's rain in one day.

This is the volatile part. January rainfall has ranged from 1 mm to 194 mm across the twenty years measured — a 193 mm spread around an average of 39 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 is light at 9.5 km/h, so the temperature on the page is close to the temperature on your skin, and humidity runs at 79%, high enough to notice on the warm days without dominating them.

How January sits in the year

This is a turning point in the year — December and February sit on opposite sides of it, so the month contains the change rather than following it.

Daylight in January

January sits at the dark end of Haiphong's year — 11 hours of daylight against 13.4 at midsummer, holding steady all month. Sightseeing days are genuinely shorter, and an itinerary built for summer will not fit.

Sea temperature

The sea sits at about 20.9 °C in January — swimmable, but it takes a moment to commit. The sea peaks at 29.9 °C in August and bottoms out at 20.4 °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

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.

January in Haiphong versus nearby

If Haiphong is one option among several, the nearby comparison is worth making. Hanoi is close enough to be a coin toss — within a degree on temperature, 1 day less rain. Thanh Hóa is close enough to be a coin toss — within a degree on temperature, 1 day less rain.

So: January is effectively as good as it gets here — 2 points behind December, which is inside the margin where the weather stops being the deciding factor and price starts being it.

Every month in Haiphong

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