Cool
Average highs are around 19°C, so pack for cooler days.
September verdict
Rebun Island, Japan in September
Weather score39Poor
Poor for holiday weather
Average highs are around 19°C, so pack for cooler days. Sunshine averages 5.9h per day, enough for a balanced month. Rainfall averages 132mm, so some wet days are possible.
September weather
Monthly averages
Temp
19°C
Rain
132mm
Sun
5.9h
Sea
20°C
Weather score
39
Poor
Seasonal climate calendar
TemperatureTemp
RainRain
SunSun
SwimSwim
Weather scoreWeather score
Trip feel
Showers
Rainfall averages 132mm, so some wet days are possible.
Some sun
Sunshine averages 5.9h per day, enough for a balanced month.
Cool sea
Sea temperatures average 20°C, so the water can feel cool.
Map
Weather map
Compare Rebun Island, Japan with nearby places by weather score, rain, sun, temperature, and swim conditions.
Temperature
September19°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
September132mm average rain
September is one of Rebun Island's wettest months, so rain is likely to be a major planning factor.
Driest monthsJanuary to June
This is the drier part of the year, when outdoor plans usually need less weather flexibility.
Sun
September5.9 hours average sun
September is one of Rebun Island's sunniest months, with some of the strongest bright-day conditions in the yearly averages.
Brightest monthsApril to September
This stretch has the strongest sunshine in the monthly averages.
Sea temperature
September20°C average sea
September is one of Rebun Island's warmest sea months, when swimming comfort is usually strongest.
Warmest seaJuly to October
Sea temperatures are usually near 17°C in this stretch, so swimming comfort is at its strongest.
Weather score
September39 weather score
September scores above Rebun Island's yearly average, so the overall weather mix is stronger than most months.
Best weather monthsJuly to September
These months have the strongest weather score in the monthly averages.