Cool
Average highs are around 18°C, so pack for cooler days.
May verdict
Nagano, Nagano, Japan in May
Weather score28Poor
Poor for holiday weather
Average highs are around 18°C, so pack for cooler days. Sunshine averages 6.4h per day, enough for a balanced month. Rainfall averages 113mm, so some wet days are possible.
May weather
Monthly averages
Temp
18°C
Rain
113mm
Sun
6.4h
Sea
15°C
Weather score
28
Poor
Seasonal climate calendar
TemperatureTemp
RainRain
SunSun
SwimSwim
Weather scoreWeather score
Trip feel
Showers
Rainfall averages 113mm, so some wet days are possible.
Some sun
Sunshine averages 6.4h per day, enough for a balanced month.
Cool sea
Sea temperatures average 15°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
May18°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
May113mm average rain
May sits on the drier side of Nagano's year, which helps with sightseeing and transfers.
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
May6.4 hours average sun
May is one of Nagano's sunniest months, with some of the strongest bright-day conditions in the yearly averages.
Brightest monthsApril to May
This stretch has the strongest sunshine in the monthly averages.
Sea temperature
May15°C average sea
May is below Nagano's yearly sea-temperature average, so swimming can feel fresher.
Warmest seaJuly to September
Sea temperatures are usually near 24°C in this stretch, so swimming comfort is at its strongest.
Weather score
May28 weather score
May scores below Nagano's yearly average, so the weather trade-offs are more noticeable.
Best weather monthsJuly to September
These months have the strongest weather score in the monthly averages.
