The temperatures in Nagasaki in December are quite cold with temperatures between 44°F and 53°F, warm clothes are a must.
You can expect about 3 to 8 days of rain in Nagasaki during the month of December. It’s a good idea to bring along your umbrella so that you don’t get caught in poor weather.
Please note that Nagasaki can expect a few days of snow in December.
Our weather forecast can give you a great sense of what weather to expect in Nagasaki in December 2025.
If you’re planning to visit Nagasaki in the near future, we highly recommend that you review the 14 day weather forecast for Nagasaki before you arrive.
Temperatures
53° / 44°
Rainy Days
7
Snowy Days
2
Dry Days
22
Rainfall
4.29
in
Sun Hours
8.2
Hrs
