Mild
Average highs are around 25°C, so days are mild rather than hot.
September verdict
Sera, Hiroshima, Japan in September
Weather score56Good
Good for holiday weather
Average highs are around 25°C, so days are mild rather than hot. Sunshine averages 5h per day, enough for a balanced month. Rainfall averages 186mm, so showers are a real planning factor.
September weather
Monthly averages
Temp
25°C
Rain
186mm
Sun
5h
Sea
27°C
Weather score
56
Good
Seasonal climate calendar
TemperatureTemp
RainRain
SunSun
SwimSwim
Weather scoreWeather score
Trip feel
Wet
Rainfall averages 186mm, so showers are a real planning factor.
Some sun
Sunshine averages 5h per day, enough for a balanced month.
Swimmable
Sea temperatures average 27°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
September25°C average high
September sits in the warmer part of the year, so midday sightseeing can feel heavier than in cooler months.
Warmest monthsJune to September
This stretch sets the upper range for average daytime heat.
Rain
September186mm average rain
September is wetter than Sera's yearly average, so flexible plans matter more.
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
September5 hours average sun
September sits close to Sera's yearly sunshine average, so it is a middle-of-the-pack month for bright days.
Brightest monthsApril to May and August
This stretch has the strongest sunshine in the monthly averages.
Sea temperature
September27°C average sea
September is one of Sera's warmest sea months, when swimming comfort is usually strongest.
Warmest seaJuly to September
Sea temperatures are usually near 25°C in this stretch, so swimming comfort is at its strongest.
Weather score
September56 weather score
September 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.
