Warm
Average highs sit around 28°C, giving warm days by monthly-average standards.
Weather Guide
Sera, Hiroshima, Japan Average Monthly Weather
Weather score37Poor annual avg
Best months: August, July, September
Across the year, average daytime temperatures are around 17°C, sunshine averages 5.1h per day, and rainfall totals about 1509mm. Sea temperatures average 19°C across the year.
Annual weather
Annual averages
Temp
17°C
Rain
1509mm
Annual total
Sun
5.1h
Sea
19°C
Weather score
37
Poor avg
Seasonal climate calendar
TemperatureTemp
RainRain
SunSun
SwimSwim
Weather scoreWeather score
Trip feel
Wet
Rainfall averages 240mm, so showers are a real planning factor.
Some sun
Sunshine averages 5.7h per day, enough for a balanced month.
Swimmable
Sea temperatures average 25°C, which can work for swimming but may feel fresh.
Map
Weather map
Compare Sera, Hiroshima, Japan with nearby places by weather score, rain, sun, temperature, and swim conditions.
Temperature
July28°C average high
July is one of Sera's warmest months, with daytime heat above the yearly average.
Warmest monthsJune to September
This stretch sets the upper range for average daytime heat.
Rain
July240mm average rain
July is one of Sera's wettest months, so rain is likely to be a major planning factor.
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
July5.7 hours average sun
July is brighter than Sera's yearly average, though the strongest sunshine usually sits closer to the peak months.
Brightest monthsApril to May and August
This stretch has the strongest sunshine in the monthly averages.
Sea temperature
July25°C average sea
July sits in the warmer sea-temperature season, usually making swimming easier to enjoy.
Warmest seaJuly to September
Sea temperatures are usually near 25°C in this stretch, so swimming comfort is at its strongest.
Weather score
July58 weather score
July scores above Sera's yearly average, so the overall weather mix is stronger than most months.
Best weather monthsJuly to August
These months have the strongest weather score in the monthly averages.
