Cool
Average highs are around 3°C, so pack for cooler days.
December verdict
Karuizawa, Japan in December
Weather score30Poor
Poor for holiday weather
Average highs are around 3°C, so pack for cooler days. Sunshine averages 5h per day, enough for a balanced month. Rainfall averages 30mm, which is relatively low for holiday planning.
December weather
Monthly averages
Temp
3°C
Rain
30mm
Sun
5h
Weather score
30
Poor
Seasonal climate calendar
TemperatureTemp
RainRain
SunSun
Weather scoreWeather score
Trip feel
Drier
Rainfall averages 30mm, which is relatively low for holiday planning.
Some sun
Sunshine averages 5h per day, enough for a balanced month.
Map
Weather map
Compare Karuizawa, Japan with nearby places by weather score, rain, sun, temperature, and swim conditions.
Temperature
December3°C average high
December is on the cooler side of Karuizawa'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
December30mm average rain
December is one of Karuizawa's driest months, making outdoor days easier to plan than in wetter parts of the year.
Driest monthsJanuary to March and November to December
This is the drier part of the year, when outdoor plans usually need less weather flexibility.
Sun
December5 hours average sun
December sits close to Karuizawa's yearly sunshine average, so it is a middle-of-the-pack month for bright days.
Brightest monthsMarch to May
This stretch has the strongest sunshine in the monthly averages.
Weather score
December30 weather score
December sits close to Karuizawa's yearly weather-score average, giving a typical overall read on the month.
Best weather monthsJuly to August
These months have the strongest weather score in the monthly averages.
