Hiroshima lies in a humid subtropical zone with wet and sultry summers and mild dry winters.
Due to its urban nature, Hiroshima is a year-round destination.
Normal summer temperatures soar to between 30 and 33 °C, accompanied by high humidity and monsoon rains.
In winter, temperatures drop to an average of 8 °C to 13 °C, and winter is the driest time of the year. Snow is an exceptional affair in Hiroshima.
Temperatures and weather during the year
A detailed weather breakdown by month is described in our guide to Miyajima Island, which lies just an hour by boat from Hiroshima.
Weather in winter
Winters in Hiroshima are mild with minimal rain and often partly or completely clear skies.
Temperatures usually stay around 11°C, but can drop to freezing at night.
Spring weather
Spring is a popular month to travel to Japan because of the blooming gardens and trees.
Sakura trees are already in bloom in this region at the end of winter, around the end of February and beginning of March.
Normal spring temperatures are between 16°C and 22°C. It rains on average about 10 days a month, but the rainfall is light and usually only in showers.
Summer weather
Summer is the monsoon rainy season in southern Japan, occurring mainly in June and July.
The humidity is high and temperatures soar to between 29 °C and 34 °C.
Weather in autumn
Autumn is the best time to travel to Hiroshima and especially its surroundings.
Temperatures stay at a comfortable 17 °C to 25 °C, there is considerably less rain than in summer and generally clear or partly cloudy skies.
The main season for colourful trees is from mid to late November.
Table of temperatures during the year
Hiroshima - Weather and temperatures during the year
When to go to Hiroshima
If you're heading to Hiroshima mainly for the sights and to visit the memorial sites after the dropping of the atomic bomb, head to the city any time of year.
If Hiroshima is also the starting point for trips to Miyajima Island or the mountains, the best times are spring and autumn, when temperatures are pleasant and there is little rain.
Sunny and very little rainy winter is also a good time, if you don't mind temperatures of around 10°C to 14°C.
