Cool
Average highs are around 7°C, so pack for cooler days.
December verdict
Sado Island, Japan in December
Weather score8Poor
Poor for holiday weather
Average highs are around 7°C, so pack for cooler days. Sunshine averages 1.8h per day, so this is not one of the brighter months. Rainfall averages 179mm, so some wet days are possible.
December weather
Monthly averages
Temp
7°C
Rain
179mm
Sun
1.8h
Sea
15°C
Weather score
8
Poor
Seasonal climate calendar
TemperatureTemp
RainRain
SunSun
SwimSwim
Weather scoreWeather score
Trip feel
Showers
Rainfall averages 179mm, so some wet days are possible.
Limited sun
Sunshine averages 1.8h per day, so this is not one of the brighter months.
Cool sea
Sea temperatures average 15°C, so the water can feel cool.
Map
Weather map
Compare Sado Island, Japan with nearby places by weather score, rain, sun, temperature, and swim conditions.
Temperature
December7°C average high
December is on the cooler side of Sado Island's year, useful if you prefer less intense daytime heat.
Warmest monthsJuly to September
This stretch sets the upper range for average daytime heat.
Rain
December179mm average rain
December is one of Sado Island's wettest months, so rain is likely to be a major planning factor.
Driest monthsFebruary to May
This is the drier part of the year, when outdoor plans usually need less weather flexibility.
Sun
December1.8 hours average sun
December is one of Sado Island's cloudier months, so sunshine-led plans are less reliable.
Brightest monthsApril to June and August
This stretch has the strongest sunshine in the monthly averages.
Sea temperature
December15°C average sea
December is below Sado Island's yearly sea-temperature average, so swimming can feel fresher.
Warmest seaJuly to September
Sea temperatures are usually near 23°C in this stretch, so swimming comfort is at its strongest.
Weather score
December8 weather score
December is one of the weakest weather-score months, when the overall mix is less favourable than the rest of the year.
Best weather monthsJuly to August
These months have the strongest weather score in the monthly averages.
Hotels near Sado Island, Japan
Marriott
Courtyard HakubaNagano, Nagano, Japan
The Ritz-Carlton, NikkoNikko, Tochigi, Japan
Fairfield by Marriott Tochigi NikkoTochigi, Tochigi, Japan
Karuizawa Marriott HotelKaruizawa, Japan
Matsumoto Jujo, a Member of Design Hotels™Matsumoto, Nagano, Japan
Fairfield by Marriott Tochigi UtsunomiyaTochigi, Tochigi, Japan