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, sees big temperature differences between seasons, with August peaking at 31°C (88°F) and January dropping to 9°C (48°F).
The city receives considerable rain/snowfall, with around 1650 mm (65 in) annually. July is the wettest month. It has very warm summers and cold winters. Sunshine peaks in May, when the city sees around 7.1 hours of sunshine per day.
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
Visitors to Hiroshima can expect significant temperature changes throughout the year. Typically, average maximum daytime temperatures range from a very warm 31°C (88°F) in August to a chilly 9°C (48°F) in the coolest month, January.
Nights vary from 24°C (75°F) in August to around 2°C (36°F) during the colder months.
Check out our detailed temperature page for more information.
Temperature ranges by month
Rainfall in Hiroshima
Hiroshima is known for its substantial rain/snowfall, with annual precipitation reaching 1650 mm (65 in). The climate in Hiroshima shows significant variation throughout the year. Expect heavy rainfall in July, the wettest month, with an average of 247 mm (9.7 in) of precipitation over 17 rainy days.
In contrast, the driest month January offers drier and sunnier days, with around 63 mm (2.5 in) of rainfall over 18 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 offers a pleasant mix of sunny and slightly overcast days. The difference in sunshine hours between May (7.1 hours daily) and January (4.6 hours daily) provides a bit of variety for visitors and residents.
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
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: May and October
- Warmest weather: July and August
- Most sunshine: May and August
- Fewer rainy days: April, May, August, October and November
- Seasonal pattern: Very warm summers and cold winters
Frequently asked questions about the climate in Hiroshima
What is the best time to visit Hiroshima?
May and October typically offer the most optimal weather in Hiroshima. In contrast, January, February 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 9°C (48°F) in January to 31°C (88°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 1650 mm (65 in). July is the wettest month with 247 mm (9.7 in), while January is the driest with 63 mm (2.5 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.
Popular this month
Where to go in August - average daytime high across popular destinations.
Bucket list
Need travel inspiration? Check out our bucket list articles and be inspired.
Chase the autumn leaves in Japan
Japan is one of these cases which turns into a gold, yellow and orange fairy tale starting from September. And we can honestly say: We cannot imagine a more beautiful season to visit Japan.
Walk the 88 temple circuit
We recommend walking the 88 temple circuit from April til October. Although June, July and August can be a bit wet, hot and humid.
The famous bamboo forests of Arashiyama
The famous bamboo forests of Arashiyama lie just outside the city center of Kyoto and is unique in the world. If you look at photos of this bamboo forest, it looks like you have landed in a fairy-tale world.
10 reasons why you should visit Japan in winter
Here are 10 reasons why you should plan a winter trip to Japan. During this period, popular sights are less busy and prices for flights and hotels much cheaper.