Is Nagasaki hot in December?
Days are typically cool at 13.2°C, while nights average 5.5°C.
Japan · 1991–2020 normal
Typical December weather in Nagasaki: 13.2°C by day, 5.5°C at night, 93 mm of rain over 10.2 wet days. These are measured 1991–2020 station normals, not a forecast.
In the year-round weather comparison, December scores 33 out of 100 (October leads the year at 81). Daylight is calculated as 10 h 00 from latitude 32.75°. Open-water sea temperature is 18.7°C (14 km from the place centre).
December at a glance
Plain answers from the measured climate record—not a forecast or a promise about a particular trip.
Days are typically cool at 13.2°C, while nights average 5.5°C.
The measured monthly average is 93 mm across about 10 wet days.
There are about 10 h 00 between sunrise and sunset at mid-month, calculated from the place latitude.
December ranks 7 of 12 in our weather comparison; October ranks first.
The evidence behind this page
Next step
The weather comparison for Nagasaki is based on climate evidence, not payments from travel companies. Flight, accommodation and activity links will be clearly labelled when they are added; there are no booking offers on this page today.
How travel partnerships will work