Cool
Average highs are around 16°C, so pack for cooler days.
May verdict
Karuizawa, Japan in May
Weather score27Poor
Poor for holiday weather
Average highs are around 16°C, so pack for cooler days. Sunshine averages 6.2h per day, enough for a balanced month. Rainfall averages 124mm, so some wet days are possible.
May weather
Monthly averages
Temp
16°C
Rain
124mm
Sun
6.2h
Weather score
27
Poor
Seasonal climate calendar
TemperatureTemp
RainRain
SunSun
Weather scoreWeather score
Trip feel
Showers
Rainfall averages 124mm, so some wet days are possible.
Some sun
Sunshine averages 6.2h 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
May16°C average high
May sits in the warmer part of the year, so midday sightseeing can feel heavier than in cooler months.
Warmest monthsJune to September
This stretch sets the upper range for average daytime heat.
Rain
May124mm average rain
May sits near Karuizawa's yearly rainfall average, so rain is a normal planning factor rather than an outlier.
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
May6.2 hours average sun
May is one of Karuizawa's sunniest months, with some of the strongest bright-day conditions in the yearly averages.
Brightest monthsMarch to May
This stretch has the strongest sunshine in the monthly averages.
Weather score
May27 weather score
May scores below Karuizawa'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.
