Cool
Average highs are around 4°C, so pack for cooler days.
December verdict
Dewa Sanzan, Japan in December
Weather score11Poor
Poor for holiday weather
Average highs are around 4°C, so pack for cooler days. Sunshine averages 2.3h per day, so this is not one of the brighter months. Rainfall averages 145mm, so some wet days are possible.
December weather
Monthly averages
Temp
4°C
Rain
145mm
Sun
2.3h
Sea
15°C
Weather score
11
Poor
Seasonal climate calendar
TemperatureTemp
RainRain
SunSun
SwimSwim
Weather scoreWeather score
Trip feel
Showers
Rainfall averages 145mm, so some wet days are possible.
Limited sun
Sunshine averages 2.3h 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 Dewa Sanzan, Japan with nearby places by weather score, rain, sun, temperature, and swim conditions.
Temperature
December4°C average high
December is on the cooler side of Dewa Sanzan's year, useful if you prefer less intense daytime heat.
Warmest monthsJune to September
This stretch sets the upper range for average daytime heat.
Rain
December145mm average rain
December sits near Dewa Sanzan's yearly rainfall average, so rain is a normal planning factor rather than an outlier.
Driest monthsJanuary to May
This is the drier part of the year, when outdoor plans usually need less weather flexibility.
Sun
December2.3 hours average sun
December is one of Dewa Sanzan's cloudier months, so sunshine-led plans are less reliable.
Brightest monthsApril to May and August
This stretch has the strongest sunshine in the monthly averages.
Sea temperature
December15°C average sea
December is below Dewa Sanzan'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
December11 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 Dewa Sanzan, Japan
Marriott
The Westin SendaiSendai, Miyagi, Japan
Four Points Flex by Sheraton MoriokaMorioka, Iwate, Japan
Fairfield by Marriott Tochigi NikkoTochigi, Tochigi, Japan
The Ritz-Carlton, NikkoNikko, Tochigi, Japan
Fairfield by Marriott Tochigi UtsunomiyaTochigi, Tochigi, Japan
Four Points Flex by Sheraton UtsunomiyaUtsunomiya, Tochigi, Japan