Weather in Hiroshima in July

A hard month. July asks something of you. Go in knowing what. The heat itself is manageable at 30.6 °C, but 86% humidity is what you will actually feel.

July ranks 11 of 12 — near the bottom of Hiroshima's year. October is the month that works, and the swing between the two is 38 points, which is a different holiday rather than a slightly better one.

This is wet-season rain: 15 wet days and 7 genuinely heavy ones, which in this climate means concentrated downpours rather than all-day grey. The pattern is usually a clear morning and a loud afternoon, so front-load the day and stop fighting the 3pm hour. Natural fibres and a second shirt for the day. At 86% nothing dries, including you.

What the averages hide

Averages flatten a month, and this one hides a few things: 19 days top 30 °C — hot spells arrive, but they break. Across the twenty years measured, the hottest July day reached 35.7 °C and the coldest night fell to 15.9 °C, and the wettest single day dropped 185 mm — roughly 71% of the month's rain in one day.

July is moderately variable: 44 mm in the driest year against 526 mm in the wettest, around an average of 260 mm. Roughly two Julys in three land near that average, and the third does something else entirely.

Wind is light at 6.1 km/h, so the temperature on the page is close to the temperature on your skin, and humidity at 86% is the real story though — it is the number that decides how the day feels, not the 30.6 °C.

How July sits in the year

Temperatures hold steady either side: 27.4 °C in June, 30.6 here, 31.8 in August. Nothing about the timing within the month matters much.

Daylight in July

July is at or near the longest days of Hiroshima's year: 14.3 hours of daylight, losing 0.5 hours across the month. Evenings are the real gain — dinner outdoors still happens in full light.

Sea temperature

The sea sits at about 24 °C in July — warm enough to stay in as long as you like. This is the warmest the water gets all year.

How busy it gets

Quiet. Few other visitors, cheaper rooms, and a real chance some seasonal operators are shut.

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

July in Hiroshima versus nearby

If Hiroshima is one option among several, the nearby comparison is worth making. Kitakyushu is a better bet in July — 2.8 °C cooler, 3 days more rain. Fukuoka is close enough to be a coin toss — within a degree on temperature, 3 days more rain.

So: July is a compromise. October is 35 points better and is what Hiroshima 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 Hiroshima

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