Mild
Average highs are around 22°C, so days are mild rather than hot.
Weather Guide
Hiroshima City, Hiroshima, Japan Average Monthly Weather
Weather score38Poor annual avg
Best months: August, September, July
Across the year, average daytime temperatures are around 19°C, sunshine averages 5.2h per day, and rainfall totals about 1607mm. Sea temperatures average 19°C across the year.
Annual weather
Annual averages
Temp
19°C
Rain
1607mm
Annual total
Sun
5.2h
Sea
19°C
Weather score
38
Poor avg
Seasonal climate calendar
Trip feel
Showers
Rainfall averages 105mm, so some wet days are possible.
Some sun
Sunshine averages 5.4h per day, enough for a balanced month.
Swimmable
Sea temperatures average 23°C, which can work for swimming but may feel fresh.
Map
Weather map
Compare Hiroshima City, Hiroshima, Japan with nearby places by weather score, rain, sun, temperature, and swim conditions.
Temperature
October22°C average high
October is close to Hiroshima City's yearly temperature average, giving a typical read on daytime heat.
Warmest monthsJune to September
This stretch sets the upper range for average daytime heat.
Rain
October105mm average rain
October sits on the drier side of Hiroshima City's year, which helps with sightseeing and transfers.
Driest monthsJanuary to March and October to December
This is the drier part of the year, when outdoor plans usually need less weather flexibility.
Sun
October5.4 hours average sun
October sits close to Hiroshima City's yearly sunshine average, so it is a middle-of-the-pack month for bright days.
Brightest monthsMay and August
This stretch has the strongest sunshine in the monthly averages.
Sea temperature
October23°C average sea
October sits in the warmer sea-temperature season, usually making swimming easier to enjoy.
Warmest seaJuly to October
Sea temperatures are usually near 24°C in this stretch, so swimming comfort is at its strongest.
Weather score
October50 weather score
October sits close to Hiroshima City's yearly weather-score average, giving a typical overall read on the month.
Best weather monthsAugust to September
These months have the strongest weather score in the monthly averages.
