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Hiroshima City

Hiroshima City 1
Travel Info
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Travel Info

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Hiroshima City Weather, Climate and Best Time to Visit

Data source：Meteostat
Update date：2025-09

Hiroshima City year round climate

  • Spring (March–May): Average 11.2–19.8°C, mild and rainy climate. Cherry blossoms bloom from March, but rainfall is relatively high. Common activities: cherry blossom viewing, outdoor excursions (be prepared for rain). Recommended clothing: light jacket, long-sleeved shirt, umbrella or raincoat.
  • Summer (June–August): Average 23.7–30.0°C, hot and humid. July has the most rainfall. Be mindful of heatstroke and sun protection. Common activities: swimming at the beach, mountain climbing (avoid afternoon thunderstorms). Recommended clothing: light and breathable clothing, sun hat, sunglasses.
  • Autumn (September–November): Average 14.4–27.3°C, comfortable and pleasant climate. Rainfall gradually decreases. Common activities: maple leaf viewing, outdoor outings. Recommended clothing: long-sleeved shirt, light jacket.
  • Winter (December–February): Average 5.8–7.3°C, cold and dry climate with low rainfall. Common activities: onsen trips, indoor activities. Recommended clothing: warm jacket, scarf, gloves.

Hiroshima City climatological average

Annual average temperature: approx. 17.6°C / Annual rainfall: approx. 1529 mm / Summer humidity: 70%–80% / Rainiest month: July

Hiroshima City monthly average temperature and precipitation

Month
Air temperature (°C)
Precipitation (mm)
January
5.8°C
33.7
February
6.7°C
73.7
March
11.2°C
115
April
16.5°C
193.3
May
19.8°C
165.7
June
23.7°C
217
July
28.3°C
308
August
30°C
83.7
September
27.3°C
128.3
October
19.7°C
72
November
14.4°C
111
December
7.3°C
28.3

Hiroshima City weather for the next seven days

9/14
Monday
Light rain shower
28.3°C/21.4°C
9/15
Tuesday
Light rain shower
24.7°C/20.1°C
9/16
Wednesday
Mist
27.2°C/19.1°C
9/17
Thursday
Mist
26.1°C/18.3°C
9/18
Friday
Light rain shower
23.4°C/20.2°C
9/19
Saturday
Light rain shower
21.6°C/19.5°C
9/20
Sunday
Overcast
26.5°C/19.2°C

Hiroshima City Frequently Asked Questions and Useful Information for Travel

Is Hiroshima a town or a city?

Hiroshima became the tenth Ordinance-Designated City in Japan on April 1, 1980.

Is radiation still a problem in Hiroshima?

No, radiation is not a significant problem in Hiroshima today. Radiation levels are comparable to global background radiation and pose no effect on human health. The atomic bombs detonated far above the ground, minimizing radioactive fallout. Wind, natural decay, and typhoons helped to quickly disperse and wash away any significant contamination.

What is Hiroshima City known for?

Hiroshima is most famous for being the city where the first atomic bomb was dropped in 1945, making it a powerful symbol of peace. Key landmarks include the Peace Memorial Park, the Atomic Bomb Dome, and the Peace Memorial Museum. Beyond its wartime history, the city is also known for its modern architecture, scenic coastal areas, and delicious cuisine, particularly Hiroshima-style okonomiyaki and local oysters.

How many people died in Hiroshima?

Over the next two to four months following the atomic bombing, an estimated 90,000 to 166,000 people died in Hiroshima.

What are the main peace-related attractions in Hiroshima?

The main peace-related attractions in Hiroshima include the iconic Peace Memorial Park, a vast green space dedicated to remembrance and peace. Within the park, you'll find the Hiroshima Peace Memorial Museum, which houses exhibits detailing the city's history and the impact of the atomic bomb, and the Children's Peace Monument, a poignant tribute to the child victims. The Atomic Bomb Dome, a UNESCO World Heritage site, is also a must-visit, standing as a stark reminder of the destruction.