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Hiroshima

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Hiroshima Weather, Climate and Best Time to Visit

Data source：Meteostat
Update date：2025-09

Hiroshima year round climate

  • Spring (March–May): Average 11.2–19.8°C, mild climate, but relatively high rainfall, especially in April. Common activities: Cherry blossom viewing (be mindful of rain), outdoor walks (bring rain gear). Recommended clothing: Light jacket, long-sleeved shirt, rain gear.
  • Summer (June–August): Average 23.7–30.0°C, hot and humid, with the most rainfall in July. Common activities: Swimming, mountain climbing (pay attention to heatstroke prevention), visiting indoor attractions. Recommended clothing: Light and breathable clothing, hat, sunscreen.
  • Autumn (September–November): Average 14.4–27.3°C, pleasant and comfortable climate, with gradually decreasing rainfall. Common activities: Maple leaf viewing (in some areas), outdoor activities. Recommended clothing: Light jacket, long-sleeved shirt.
  • Winter (December–February): Average 5.8–7.3°C, cold and dry, with less rainfall. Common activities: Indoor activities, hot spring bathing. Recommended clothing: Warm jacket, sweater, scarf, gloves.

Hiroshima climatological average

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

Hiroshima 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 weather for the next seven days

5/11
Monday
Sunny
20.8°C/10.6°C
5/12
Tuesday
Sunny
21.1°C/10.6°C
5/13
Wednesday
Patchy rain nearby
21.7°C/13.1°C
5/14
Thursday
Sunny
23.6°C/12.9°C
5/15
Friday
Sunny
23.3°C/11.9°C
5/16
Saturday
Sunny
24.3°C/12.7°C
5/17
Sunday
Sunny
25.2°C/13.9°C

Hiroshima Frequently Asked Questions and Useful Information for Travel

Is it safe to visit Hiroshima now?

Hiroshima, once the site of unprecedented nuclear devastation, now registers radiation levels comparable to any other place on Earth. Over the decades, radioactive decay has made the city safe for residents and visitors.

Why did the US bomb Hiroshima?

President Truman's goal was to destroy Japan's ability to make war. So, on the morning of August 6, 1945, the American B-29 bomber, the Enola Gay, dropped the world's first atom bomb over the city of Hiroshima.

Did the US warn Japan about Hiroshima?

No specific mention of atomic bombs was made to the Japanese government prior to bombing Hiroshima. However, Americans did drop leaflets over Japanese cities which had not been bombed yet, warning residents to evacuate the area.

What is the significance of the Peace Memorial Park in Hiroshima?

The Hiroshima Peace Memorial Park is a poignant tribute to the victims of the atomic bombing. It serves as a solemn reminder of the devastation and a powerful symbol of peace, encouraging visitors to reflect on the importance of global harmony.

What are some must-try foods in Hiroshima?

Hiroshima is famous for its delicious okonomiyaki, a savory pancake layered with noodles, cabbage, and your choice of fillings. Another local specialty is oysters, which are fresh and abundant in the Seto Inland Sea.