Weather in Green Bay: December
![]() |
Average day temperature: | 31.1°F |
Average night temperature: | 26.2°F | |
![]() |
Sea water temperature: | 36.4°F |
![]() |
Number of sunny days: | 5 days |
Day length: | 8.8 - 9.1 hours | |
![]() |
Number of rainy days: | 0 days |
Precipitation totals: | 0.4 in. | |
more information |
forecast
Green Bay |
temperature
Green Bay |
Air temperature in December, °F
Day temperature | Night temperature |
The highest day temperature during December of 2024 was 39°F. At the same time the lowest night temperature was 2°F. Daily and nightly averages during December were 29.9°F and 24.3°F.
Sea water temperature in Green Bay in December, °F
The average sea water temperature in December of 2024 was 36.9°F. The highest and lowest sea temperatures during the month were 42.3°F and 32.2°F.
Sunny days | |
Partly cloudy days | |
Cloudy days |
Mostly all days in December are cloudy but sunny and partly cloudy days are also possible.
Precipitation total in December, in.
Precipitation total value in Green Bay in December is 0.4 in. Other months of the year show relatively similar values.
The average wind speed value in December is 9.5 mph
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: 3.3.
Best time for vacation in Green Bay
Green Bay on a weather map

14 mph

12 mph

8 mph

5 mph

7 mph

6 mph

8 mph

9 mph