Weather in Nagasaki: December
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Average day temperature: | 53.7°F |
| Average night temperature: | 48.9°F | |
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Sea water temperature: | 64.6°F |
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Number of sunny days: | 9 days |
| Day length: | 10.0 - 10.2 hours | |
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Number of rainy days: | 4 days |
| Precipitation totals: | 3.1 in. | |
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forecast
| Nagasaki |
temperature
| Nagasaki |
Air temperature in December, °F
The highest day temperature during December of 2025 was 66°F. At the same time the lowest night temperature was 35°F. Daily and nightly averages during December were 55.4°F and 50.6°F.
Sea water temperature in Nagasaki in December, °F
The average sea water temperature in December of 2025 was 66.9°F. The highest and lowest sea temperatures during the month were 69.6°F and 64.4°F.
Number of sunny, partly cloudy and cloudy days in December is almost equal.
Precipitation total in December, in.
Precipitation total value in Nagasaki in December is 2.4 in. It makes december the most dry month of the year.
The average wind speed value in December is 10.0 mph It makes December one of the most windy months of the year.
This chart shows average number of hours during the day when sunlight can reach the ground. It depends on day length and cloudiness during the day. The average number of sunny hours in December is: 5.1.
Best time for vacation in Nagasaki
Nagasaki on a weather map
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