Mild
Average highs are around 21°C, so days are mild rather than hot.
June verdict
Nagano, Nagano, Japan in June
Weather score33Poor
Poor for holiday weather
Average highs are around 21°C, so days are mild rather than hot. Sunshine averages 4.8h per day, so this is not one of the brighter months. Rainfall averages 190mm, so showers are a real planning factor.
June weather
Monthly averages
Temp
21°C
Rain
190mm
Sun
4.8h
Sea
20°C
Weather score
33
Poor
Seasonal climate calendar
TemperatureTemp
RainRain
SunSun
SwimSwim
Weather scoreWeather score
Trip feel
Wet
Rainfall averages 190mm, so showers are a real planning factor.
Limited sun
Sunshine averages 4.8h per day, so this is not one of the brighter months.
Cool sea
Sea temperatures average 20°C, so the water can feel cool.
Map
Weather map
Compare Nagano, Nagano, Japan with nearby places by weather score, rain, sun, temperature, and swim conditions.
Temperature
June21°C average high
June 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
June190mm average rain
June is wetter than Nagano's yearly average, so flexible plans matter more.
Driest monthsJanuary to May and October to December
This is the drier part of the year, when outdoor plans usually need less weather flexibility.
Sun
June4.8 hours average sun
June sits close to Nagano's yearly sunshine average, so it is a middle-of-the-pack month for bright days.
Brightest monthsApril to May
This stretch has the strongest sunshine in the monthly averages.
Sea temperature
June20°C average sea
June is close to Nagano's yearly sea-temperature average, so swimming comfort is fairly typical.
Warmest seaJuly to September
Sea temperatures are usually near 24°C in this stretch, so swimming comfort is at its strongest.
Weather score
June33 weather score
June sits close to Nagano's yearly weather-score average, giving a typical overall read on the month.
Best weather monthsJuly to September
These months have the strongest weather score in the monthly averages.
