Weather in Hiroshima in April

A good month. April works. It is not the peak, but nothing about it fights you. Highs average 19.3 °C, lows 7.9 °C, and rain falls on 11 days — nothing in the month is working against you.

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

Rain on 11 days, 4 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 April reaches 30 °C. Across the twenty years measured, the hottest April day reached 27.3 °C and the coldest night fell to -0.9 °C, and the wettest single day dropped 65 mm — roughly 52% of the month's rain in one day.

April is statistically steady but not small: the year-to-year variation is modest in relative terms, yet the wettest April on record still delivered 209 mm against 40 mm in the driest. In a month this wet, even a tame spread is a lot of rain in absolute terms — the 125 mm average is a reasonable planning figure, not a promise.

Wind is light at 8.1 km/h, so the temperature on the page is close to the temperature on your skin, and humidity runs at 78%, high enough to notice on the warm days without dominating them.

How April sits in the year

The month is on the way up: 5.5 °C warmer than March, and May adds another 4.7 °C. Late in the month feels noticeably different from the start of it, which is worth knowing if the trip is short.

Daylight in April

13 hours of daylight, gaining 1 hours across the month. That is between Hiroshima's extremes of 14.4 and 9.9 hours, so days are long enough not to constrain the plan.

Sea temperature

The sea sits at about 14.4 °C in April — cold — a quick dip rather than a swim, and a wetsuit if you are in for longer. The sea peaks at 26.9 °C in August and bottoms out at 12.9 °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.

April in Hiroshima versus nearby

If Hiroshima is one option among several, the nearby comparison is worth making. Kitakyushu is the weaker option in April — 2.4 °C cooler, the same number of rain days. Fukuoka is close enough to be a coin toss — within a degree on temperature, 1 day less rain.

So: April is effectively as good as it gets here — 5 points behind October, which is inside the margin where the weather stops being the deciding factor and price starts being it.

Every month in Hiroshima

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