Weather in Thanh Hóa in March

Prime time. If you get to pick your dates, March is the one. The heat itself is manageable at 27.3 °C, but 83% humidity is what you will actually feel.

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

Rain on 9 days, 1 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 83% nothing dries, including you.

What the averages hide

Averages flatten a month, and this one hides a few things: 8 days top 30 °C — hot spells arrive, but they break. Across the twenty years measured, the hottest March day reached 36.9 °C and the coldest night fell to 8.6 °C, and the wettest single day dropped 43 mm — roughly 96% of the month's rain in one day.

March is moderately variable: 7 mm in the driest year against 128 mm in the wettest, around an average of 45 mm. Roughly two Marchs 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 runs at 83%, high enough to notice on the warm days without dominating them.

How March sits in the year

The month is on the way up: 3 °C warmer than February, and April adds another 3.6 °C. Late in the month feels noticeably different from the start of it, which is worth knowing if the trip is short.

Daylight in March

12 hours of daylight, gaining 0.6 hours across the month. That is between Thanh Hóa's extremes of 13.3 and 10.9 hours, so days are long enough not to constrain the plan.

Sea temperature

The sea sits at about 21.8 °C in March — comfortable for a proper swim. The sea peaks at 30 °C in August and bottoms out at 21 °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.

March in Thanh Hóa versus nearby

If Thanh Hóa is one option among several, the nearby comparison is worth making. Vinh is close enough to be a coin toss — 2.5 °C warmer, the same number of rain days. Hanoi is close enough to be a coin toss — within a degree on temperature, 1 day more rain.

So: March works, with February the better month by 12 points if the dates can move. If they cannot, nothing here should stop you booking.

Every month in Thanh Hóa

See all twelve months in Thanh Hóa, or where else to go in March.