Weather in Haiphong in December

Prime time. If you get to pick your dates, December is the one. Highs average 21.7 °C, lows 13.9 °C, and rain falls on 5 days — nothing in the month is working against you.

December is the highest-scoring month of the twelve. The nearest rival is February, and the month at the other end of the year is July.

Rain falls on only 5 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 December reaches 30 °C. Across the twenty years measured, the hottest December day reached 28.6 °C and the coldest night fell to 3.5 °C.

December is moderately variable: 2 mm in the driest year against 70 mm in the wettest, around an average of 27 mm. Roughly two Decembers in three land near that average, and the third does something else entirely.

Wind is light at 9.7 km/h, so the temperature on the page is close to the temperature on your skin, and humidity runs at 76%, high enough to notice on the warm days without dominating them.

How December sits in the year

Temperatures hold steady either side: 25.7 °C in November, 21.7 here, 20.7 in January. Nothing about the timing within the month matters much.

Daylight in December

December sits at the dark end of Haiphong's year — 10.9 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 23 °C in December — comfortable for a proper swim. 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.

December 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, the same number of rain days.

So: December is the answer for Haiphong. If it is booked out or priced out, February is the next best thing at 1 points behind, and July is the month to keep off the shortlist.

Every month in Haiphong

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