Hiroshima in July: weather, what to wear and what's on

Hiroshima weather in July

Averages for 1991–2020 at the JMA's Hiroshima station (4 m above sea level).

High

30.9°C (88°F)

Low

24.1°C (75°F)

Precipitation

279.8 mm

Wet days

10.6 days

Sunshine

173 hours

Highs rise 3.7°C from June and climb another 1.9°C into August.

That is 9.8°C above Hiroshima's yearly average high of 21.1°C.

Of our 14 places with temperature records, Hiroshima is the 7th warmest in July: 0.3°C cooler than Fukuoka and 1.0°C warmer than Tokyo.

Of our 15 places, Hiroshima has the 4th highest precipitation in July: 6.3 mm less than Nikko and 2.1 mm more than Shirakawa-go.

Rain of 1 mm or more falls on 10.6 days, and 10 mm or more on 6.3 days.

Rain of 30 mm or more in one day falls on 3.3 days, and 50 mm or more on 1.7 days.

20.0 days reach 30°C or more, and 1.8 reach 35°C or more.

On 11.7 nights the low stays at 25°C or above.

The sun is out for 40% or more of the possible hours on 15.4 days, and 4.6 days have under 0.1 hours of sunshine.

By the JMA's cloud records, 1.0 days are clear and 16.1 are overcast.

On 15 July 2027 the sun rises at 5:09 and sets at 19:23 in Hiroshima, giving 14 hours 14 minutes of daylight (NAOJ).

Average temperature

27.2°C (81°F)

Humidity

73%

Days of 25°C or more

29.8 days

Early, mid and late July

By the last ten days of July the average high in Hiroshima is 3.2°C higher than in the first ten.

By ten-day totals, 1–10 July is the wettest (142.9 mm) and 21–31 July the driest (59.1 mm).

What to wear in Hiroshima in July

Hot: highs around 30.9°C

• Short sleeves and light, breathable clothes. A light layer for cold air-conditioning on trains and in shops.
• Heat: 20.0 days reach 30°C or more. A hat, water and sunscreen.
• Warm nights: on 11.7 nights the temperature stays at 25°C or above.
• An umbrella: rain falls on 10.6 days.

Pack

• Umbrella
• Hat, sunscreen and a water bottle
• A light layer for air-conditioning

• Our clothing rules

Rainy season and typhoons

In an average year (1991–2020) the JMA says the rainy season in Chugoku starts around 6 June and ends around 19 July. In 2026 it started around 4 June and ended around 8 July.

In an average July, 0.6 typhoons come within 300 km of the Chugoku region; across Japan, 2.1 come within 300 km and 0.6 make landfall (JMA, 1991–2020).

July records in Hiroshima

The extremes the JMA has measured in July at its Hiroshima station.

Hottest July day

38.7°C (102°F) on 17 July 1994 (records since 1879)

Coldest July night

14.1°C (57°F) on 4 July 1966 (records since 1879)

Wettest July day

229.0 mm on 6 July 2018 (records since 1879)

Holidays and crowds in July

National holidays in July 2027:

• Mon 19 July — Marine Day

• Sat 17 July to Mon 19 July: 3 days off in a row

In July 2025, hotels and inns across Hiroshima Prefecture were 63.0% full on average (8th busiest of 12 months). Foreign guests spent 144,330 nights there that month (Japan Tourism Agency). That compares with 59.5% in June and 67.8% in August.

• Japan in July: visitor numbers and busy travel days
• Holidays in July

What's on in Hiroshima in July

Not held, or changed

Hiroshima Minato Yume Fireworks Festival. Held on 25 July in 2026, from 20:00 to 21:00, offshore of the Hiroshima Port 10,000-ton berth. The organizer plans to move it to the fourth Saturday of September from fiscal year 2027 (Reiwa 9), so check the date before you plan around it. It goes ahead in rain and is cancelled if a typhoon or similar stops it on the day.

Official page

Hiroshima before and after July

• Hiroshima in June
• Hiroshima in August
• All 12 months in Hiroshima

Other places in July

• All 15 places in July

Related items

• Hiroshima by month
• Japan in July
• Hiroshima in June
• Hiroshima in August