Weather in Thanh Hóa in April

Shoulder season. April is shoulder season in Thanh Hóa — cheaper, quieter, and a genuine gamble. Highs average 30.9 °C, lows 21.7 °C, and rain falls on 10 days — nothing in the month is working against you.

April ranks 6 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 10 days, 2 of them heavy. Enough to need a plan B, not enough to need a plan around it. Pack for 30.9 °C days and 21.7 °C nights; the spread matters more here than any single number.

What the averages hide

Averages flatten a month, and this one hides a few things: 5 days clear 35 °C, so a serious heatwave is normal rather than notable. Across the twenty years measured, the hottest April day reached 41.9 °C and the coldest night fell to 12.8 °C, and the wettest single day dropped 65 mm — roughly 102% of the month's rain in one day.

April is moderately variable: 28 mm in the driest year against 121 mm in the wettest, around an average of 64 mm. Roughly two Aprils in three land near that average, and the third does something else entirely.

Wind is light at 8 km/h, so the temperature on the page is close to the temperature on your skin, and humidity runs at 81%, high enough to notice on the warm days without dominating them.

How April sits in the year

The month is on the way up: 3.6 °C warmer than March, and May adds another 1.6 °C. Late in the month feels noticeably different from the start of it, which is worth knowing if the trip is short. Rain is the thing that moves: May brings 8 days more of it, so the earlier half of a flexible trip is the safer half.

Daylight in April

12.6 hours of daylight, gaining 0.5 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 24.2 °C in April — warm enough to stay in as long as you like. 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

Shoulder. The value months — prices ease off and you get the place closer to itself.

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

April in Thanh Hóa versus nearby

If Thanh Hóa is one option among several, the nearby comparison is worth making. Vinh is the weaker option in April — 3 °C warmer, the same number of rain days. Hanoi is close enough to be a coin toss — within a degree on temperature, 2 days more rain.

So: April is a compromise. February is 29 points better and is what Thanh Hóa is actually like at its best — worth moving the trip for if that is possible, and worth adjusting expectations for if it is not.

Every month in Thanh Hóa

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