Hiroshima Weather & Climate: Best Time to Visit
Average temperatures, rainfall, sunshine and the best time to visit Hiroshima.
Climate overview of Hiroshima
Hiroshima, Hiroshima, Japan, experiences significant temperature variation throughout the year. Summers bring daytime highs of 32°C (90°F) in August, while winters cool to 10°C (50°F) in January.
With around 1426 mm (56 in) of annual rain/snowfall, Hiroshima has a notably wet climate. However, this rain/snowfall is not evenly distributed, the city has very warm summers and cold winters. The wettest month is June. The sunniest month is May, with 7.1 hours of sunshine per day on average.
Hiroshima Weather by Month
Pick a month to see the average temperature, rainfall and sunshine in Hiroshima - and find the best time to visit.
Monthly Temperature in Hiroshima
Depending on the time of the year, temperatures range from very warm to chilly in Hiroshima. Average daytime temperatures reach a very warm 32°C (90°F) in August. In January, the coolest month of the year, temperatures drop to a chilly 10°C (50°F).
At night, temperatures range from around 24°C (75°F) in August to 2°C (36°F) in January.
Check out our detailed temperature page for more information.
Temperature ranges by month
Rainfall in Hiroshima
Hiroshima has a relatively rain/snowy climate with high precipitation levels, averaging 1426 mm (56 in) of rain/snowfall annually. Hiroshima can be quite wet during June, receiving approximately 212 mm (8.3 in) of precipitation over 17 rainy days.
In contrast, during the driest month (January), you will experience much drier conditions, with 54 mm (2.1 in) of precipitation spread across 17 rainy days. For more details, please visit our Hiroshima Precipitation page.
The mean monthly precipitation over the year, including rain, hail, and snow
The average number of days each month with precipitation
Sunshine Hours in Hiroshima
Hiroshima experiences moderate variation in sunshine hours across the seasons. With 7.1 hours daily sunshine in May, it dips to 4.6 hours in January, offering a balanced mix of sunny and overcast days.
Visit our detailed sunshine hours page for more information.
Monthly hours of sunshine
Daily hours of sunshine
Daily percentage of sunshine
Humidity in Hiroshima by Month
The relative humidity is high throughout the year in Hiroshima.
The city experiences its highest humidity in July, reaching 73%. In April, the humidity drops to its lowest level at 61%. What does this mean? Read our detailed page on humidity levels for further details.
Relative humidity over the year
Wind Speed in Hiroshima
The mean wind speed over the year ranges from 1 m/s (2 knots) in July to 3 m/s (6 knots) in October. What does this mean?
The mean monthly wind speed over the year (meters per second)
Best Time to Visit Hiroshima
Monthly ratings reflect general weather comfort, based on daytime temperature and rainfall. Swimming and winter conditions are highlighted separately where relevant.
- Best overall: April, May, September, October and November
- Warmest weather: August
- Most sunshine: May and August
- Seasonal pattern: Very warm summers and cold winters
Frequently asked questions about the climate in Hiroshima
What is the best time to visit Hiroshima?
April, May, September, October and November typically offer the most optimal weather in Hiroshima. In contrast, January and July tend to have less optimal conditions. Hiroshima has very warm summers and cold winters.
What temperatures can I expect in Hiroshima?
Daytime highs range from 10°C (50°F) in January to 32°C (90°F) in August. Nighttime lows range from 2°C (36°F) to 24°C (75°F). Temperatures vary considerably through the year.
How much rain does Hiroshima get?
Annual rainfall is around 1426 mm (56 in). June is the wettest month with 212 mm (8.3 in), while January is the driest with 54 mm (2.1 in).
How sunny is Hiroshima?
Hiroshima receives around 2,051 hours of sunshine per year. May is the sunniest month with 212 hours, while January is the cloudiest with just 137 hours. Overall, Hiroshima enjoys abundant sunshine.
Hiroshima 3-Day Forecast
Hiroshima on the map
Hiroshima is highlighted - select any city to see its climate.
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