Mild
Average highs are around 22°C, so days are mild rather than hot.
Weather Guide
Rebun Island, Japan Average Monthly Weather
Weather score25Poor annual avg
Best months: August, September, July
Across the year, average daytime temperatures are around 9°C, sunshine averages 4.4h per day, and rainfall totals about 1095mm. Sea temperatures average 11°C across the year.
Annual weather
Annual averages
Temp
9°C
Rain
1095mm
Annual total
Sun
4.4h
Sea
11°C
Weather score
25
Poor avg
Seasonal climate calendar
TemperatureTemp
RainRain
SunSun
SwimSwim
Weather scoreWeather score
Trip feel
Showers
Rainfall averages 131mm, so some wet days are possible.
Some sun
Sunshine averages 5h 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
August22°C average high
August is one of Rebun Island'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
August131mm average rain
August 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
August5 hours average sun
August is brighter than Rebun Island's yearly average, though the strongest sunshine usually sits closer to the peak months.
Brightest monthsApril to September
This stretch has the strongest sunshine in the monthly averages.
Sea temperature
August20°C average sea
August 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
August46 weather score
August is one of Rebun Island's best weather-score months, combining the strongest overall balance in the yearly averages.
Best weather monthsJuly to September
These months have the strongest weather score in the monthly averages.