Warm
Average highs sit around 30°C, giving warm days by monthly-average standards.
September verdict
Hachijojima, Japan in September
Weather score57Good
Good for holiday weather
Average highs sit around 30°C, giving warm days by monthly-average standards. Sunshine averages 0h per day, so this is not one of the brighter months. Rainfall averages 214mm, so showers are a real planning factor.
September weather
Monthly averages
Temp
30°C
Rain
214mm
Sun
0h
Sea
27°C
Weather score
57
Good
Seasonal climate calendar
TemperatureTemp
RainRain
SunSun
SwimSwim
Weather scoreWeather score
Trip feel
Wet
Rainfall averages 214mm, so showers are a real planning factor.
Limited sun
Sunshine averages 0h per day, so this is not one of the brighter months.
Warm sea
Sea temperatures average 27°C, so swimming is usually comfortable by monthly-average standards.
Map
Weather map
Compare Hachijojima, Japan with nearby places by weather score, rain, sun, temperature, and swim conditions.
Temperature
September30°C average high
September is one of Hachijojima's warmest months, with daytime heat above the yearly average.
Warmest monthsJuly to October
This stretch sets the upper range for average daytime heat.
Rain
September214mm average rain
September is wetter than Hachijojima's yearly average, so flexible plans matter more.
Driest monthsJanuary to March, August, and November to December
This is the drier part of the year, when outdoor plans usually need less weather flexibility.
Sun
September0 hours average sun
September is close to Hachijojima's usual sunshine level, with limited seasonal swing across the year.
Brightest monthsAll year
Sunshine stays consistently strong through the year.
Sea temperature
September27°C average sea
September is one of Hachijojima's warmest sea months, when swimming comfort is usually strongest.
Warmest seaJuly to October
Sea temperatures are usually near 26°C in this stretch, so swimming comfort is at its strongest.
Weather score
September57 weather score
September sits close to Hachijojima's yearly weather-score average, giving a typical overall read on the month.
Best weather monthsJuly to August
These months have the strongest weather score in the monthly averages.
