Nagano weather in December
Temperature, rain and sunshine in December: long-term averages from 30 years of weather data, not a forecast.
Holiday weather in December
Poor
Best time to visit: May – June, October
What is the weather like in Nagano in December?
In December, Nagano is cold: daytime highs average 6 °C, and nights often drop below freezing (−1 °C). Expect around 4 hours of sunshine a day. It rains often – on about 24 days, adding up to 234 mm. Snow falls on about 15 days. All in all, December is not an ideal month for a holiday in Nagano.
December compared
How the weather changes from November to January. Tap a month to open it.
| NovemberNov | DecemberDec | JanuaryJan | |
|---|---|---|---|
| Score | 30 | 4 | 4 |
| Day | 13° | 6° | 3° |
| Night | 4° | −1° | −4° |
| Sun | 5 h | 4 h | 4 h |
| Rain days | 19 | 24 | 26 |
More details for December
- Daylight
- 9 h 41 min06:52 – 16:33
- UV index
- 2 · lowclear sky, noon (estimate)All months
- Muggy days
- 0 daysdew point 18 °C or moreAll months
- Wind
- 13 km/haverage daily peakAll months
- Cloud cover
- 70 %on averageAll months
- Hot days
- 0 days30 °C or moreAll months
- Snow days
- 15 days1 cm or more of fresh snowAll months
- Time zone
- UTC+9Asia/Tokyo
How the score comes together
- Temperatureweight 50 %0 %
- Sunshineweight 20 %20 %
- Few rainy daysweight 30 %0 %
Each factor is rated from 0 to 100 % and weighted for the travel style “City break”.
What to pack in December
- Warm jacket
- Hat, scarf & gloves
- Rain jacket or umbrella
Nagano in December: quick answers
Is Nagano hot in December?
No. In December, Nagano is cold: daytime highs average 6 °C and nights drop to about −1 °C.
Does it rain much in Nagano in December?
It rains often – on about 24 days, adding up to 234 mm.
Nagano month by month
The whole year in NaganoAll destinations: JapanWhere to go in December
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