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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 with relatively high rainfall, especially in April. Common activities: Cherry blossom viewing, outdoor walks. Recommended clothing: Light jacket, long-sleeved shirts and pants.
  • Summer (June–August): Average 23.7–30.0°C, hot and humid, with the most rainfall in July. Be mindful of sun protection and heatstroke prevention. Common activities: Swimming at the beach, mountain climbing for cooler temperatures. Recommended clothing: Light and breathable clothing, sun hat, sunscreen.
  • Autumn (September–November): Average 19.7–14.4°C, comfortable and pleasant climate with reduced rainfall. Common activities: Maple leaf viewing, enjoying autumn cuisine. Recommended clothing: Light jacket, long-sleeved shirts and pants.
  • Winter (December–February): Average 7.3–6.7°C, relatively low temperatures and humidity, with little rainfall. Common activities: Onsen (hot spring) visits, indoor leisure activities. Recommended clothing: Warm jacket, sweater, scarf.

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

9/19
Saturday
Mist
23.7°C/19.9°C
9/20
Sunday
Sunny
26°C/18.2°C
9/21
Monday
Sunny
25.4°C/17.7°C
9/22
Tuesday
Sunny
27.3°C/15.7°C
9/23
Wednesday
Sunny
26.7°C/14.7°C
9/24
Thursday
Overcast
27.1°C/16.1°C
9/25
Friday
Overcast
26.1°C/17.8°C

Hiroshima Frequently Asked Questions and Useful Information for Travel

Is it safe to visit Hiroshima now?

Today, more than 75 years later, rigorous cleanup and continuous scientific monitoring have brought background radiation levels back in line with natural norms—making modern Hiroshima not just safe to visit, but a powerful testament to both human resilience and the critical importance of nuclear preparedness.

How many days in Hiroshima is enough?

Two full days is sufficient for a first-time visitor to experience both Hiroshima and the Miyajima island, but three days allows for a more relaxed pace, inclusion of city sights like the Peace Memorial Park and Shukkei-en Garden, and perhaps a nearby day trip, like to the city of Onomichi or the Mazda Museum. The ideal length of stay depends on your travel style, with some feeling one day is enough for the highlights and others recommending longer to explore the wider prefecture's attractions.

Is it worth going to Hiroshima in Japan?

Yes, Hiroshima is generally considered worth visiting for its significant historical importance at the Peace Memorial Park, its beautiful and poignant Atomic Bomb Dome, the vibrant local food scene known for okonomiyaki, and its proximity to Miyajima Island with its famous "floating" torii gate. While the Peace Memorial Museum can be emotionally intense, the city is also seen as a symbol of resilience and a place to learn about the devastating effects of nuclear weapons and promote peace.

Are Americans welcomed in Hiroshima?

Yes, Americans are welcome in Hiroshima. Hiroshima is a major tourist destination known as the "International City of Peace & Culture," and its museums and memorials are designed for visitors to learn about the atomic bombing and promote global peace. Visitors are encouraged to be respectful of the city's history and Japanese customs to ensure a positive experience.

What are the must-see historical sites in Hiroshima?

The must-see historical sites in Hiroshima include the Peace Memorial Park, the Peace Memorial Museum, and the Atomic Bomb Dome. These locations offer a profound and educational experience about the atomic bombing, serving as a powerful message of peace and a reminder to never forget the past. The Atomic Bomb Dome, a UNESCO World Heritage site, is the stark and preserved skeleton of a building that survived the blast, standing as a haunting but resilient symbol of the city's history.