Mild
Average highs are around 25°C, so days are mild rather than hot.
December verdict
Hachijojima, Japan in December
Weather score41Mixed
Mixed for holiday weather
Average highs are around 25°C, so days are mild rather than hot. Sunshine averages 0h per day, so this is not one of the brighter months. Rainfall averages 111mm, so some wet days are possible.
December weather
Monthly averages
Temp
25°C
Rain
111mm
Sun
0h
Sea
21°C
Weather score
41
Mixed
Seasonal climate calendar
TemperatureTemp
RainRain
SunSun
SwimSwim
Weather scoreWeather score
Trip feel
Showers
Rainfall averages 111mm, so some wet days are possible.
Limited sun
Sunshine averages 0h per day, so this is not one of the brighter months.
Cool sea
Sea temperatures average 21°C, so the water can feel cool.
Map
Weather map
Compare Hachijojima, Japan with nearby places by weather score, rain, sun, temperature, and swim conditions.
Temperature
December25°C average high
December is close to Hachijojima's yearly temperature average, giving a typical read on daytime heat.
Warmest monthsJuly to October
This stretch sets the upper range for average daytime heat.
Rain
December111mm average rain
December sits on the drier side of Hachijojima's year, which helps with sightseeing and transfers.
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
December0 hours average sun
December 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
December21°C average sea
December is below Hachijojima's yearly sea-temperature average, so swimming can feel fresher.
Warmest seaJuly to October
Sea temperatures are usually near 26°C in this stretch, so swimming comfort is at its strongest.
Weather score
December41 weather score
December scores below Hachijojima's yearly average, so the weather trade-offs are more noticeable.
Best weather monthsJuly to August
These months have the strongest weather score in the monthly averages.
