Hiroshima Climate by Month
The temperature in Hiroshima can vary quite a bit throughout the year.
Temperatures can be very warm during the warmest months,
and cold during the cooler months.
It is also known for its large amounts of rain/snowfall.
Let’s explore the climate details in depth to provide you with a complete overview.
Average day and night temperature
Visitors to Hiroshima can expect significant temperature changes throughout the year. Typically, daytime temperatures range from a very warm 31°C in August to a chilly 9°C in the coolest month, January. Nights are cooler, with temperatures generally dropping to 2°C, particularly during the colder months.
The mean minimum and maximum temperatures throughout the year
Precipitation and rainy days
Hiroshima is known for its substantial rain/snowfall, with annual precipitation reaching 1650 mm. The climate in Hiroshima shows significant variation throughout the year. Expect heavy rainfall in July, with an average of 247 mm of precipitation over 17 rainy days. In contrast, January offers drier and sunnier days, with around 63 mm of rainfall over 18 rainy days.The mean monthly precipitation over the year, including rain, hail and snow
The average number of days each month with precipitation
Sunshine over the year
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.Monthly hours of sunshine
Daily hours of sunshine
Daily percentage of sunshine
Average humidity
The relative humidity is low throughout the year in Hiroshima.
Relative humidity over the year
The best time of year to visit Hiroshima in Japan
During the months of May, June and October you are most likely to experience good weather with pleasant average temperatures that fall between 20°C and 26°C.Other facts from our historical weather data:
The hottest season / summer takes place in June, July, August and September.
Most rainfall (rainy season) is seen in May, June, July, August and September.
August has an average maximum temperature of 31°C and is the warmest month of the year.
The coldest month is January with an average maximum temperature of 9°C.
July tops the wettest month list with 247 mm of rainfall.
January is the driest month with 63 mm of precipitation.
May is the sunniest month with an average of 212 hours of sunshine.
No idea where to travel to this year? We have a tool that recommends destinations based on your ideal conditions. Find out where to go with our weather planner.
