The weather in Nagano in December is very cold with temperatures between 28°F and 41°F, warm clothes are a must.
There’s going to be many days of rain during the month of December in Nagano.
Nagano should expect an average of 15 to 22 days of rain, so be sure to bring along a waterproof jacket to stay dry this month!
Nagano is going to experience quite a number of days of snow during December. It’s the perfect time to build snowmen, drink hot cocoa, and have a snowball fight. Just remember to wear a warm scarf and a pair of mittens!
Our weather forecast can give you a great sense of what weather to expect in Nagano in December 2025.
If you’re planning to visit Nagano in the near future, we highly recommend that you review the 14 day weather forecast for Nagano before you arrive.
