Nagano weather in May
Temperature, rain and sunshine in May: long-term averages from 30 years of weather data, not a forecast.
Holiday weather in May
Good
Best time to visit: May – June, October
What is the weather like in Nagano in May?
In May, Nagano is warm: daytime highs average 21 °C, and nights cool down to about 10 °C. The sun shines for around 7 hours a day. It rains often – on about 14 days, adding up to 136 mm. All in all, May is a good month for a holiday in Nagano.
May compared
How the weather changes from April to June. Tap a month to open it.
More details for May
- Daylight
- 14 h 6 min04:41 – 18:46
- UV index
- 10 · very highclear sky, noon (estimate)All months
- Muggy days
- 0 daysdew point 18 °C or moreAll months
- Wind
- 12 km/haverage daily peakAll months
- Cloud cover
- 67 %on averageAll months
- Hot days
- 0 days30 °C or moreAll months
- Snow days
- 0 days1 cm or more of fresh snowAll months
- Time zone
- UTC+9Asia/Tokyo
How the score comes together
- Temperatureweight 50 %100 %
- Sunshineweight 20 %65 %
- Few rainy daysweight 30 %29 %
Each factor is rated from 0 to 100 % and weighted for the travel style “City break”.
What to pack in May
- Sunscreen
- Sunglasses & sun hat
- A jumper for the evenings
- Rain jacket or umbrella
Nagano in May: quick answers
Is Nagano hot in May?
Warm rather than hot: in May, daytime highs in Nagano average 21 °C and nights cool to about 10 °C.
Does it rain much in Nagano in May?
It rains often – on about 14 days, adding up to 136 mm.
Nagano month by month
The whole year in NaganoAll destinations: JapanWhere to go in May
Climate averages 1996–2025, not a forecast. Data: Copernicus ERA5 / ERA5-Land via Open-Meteo.com (CC BY 4.0), NOAA OISST, WMO 1991–2020 (NOAA NCEI), GeoNames (CC BY 4.0). Sources & licences