Weather in Lake Geneva: December
![]() |
Average day temperature: | 34.5°F |
Average night temperature: | 29.0°F | |
![]() |
Sea water temperature: | 36.7°F |
![]() |
Number of sunny days: | 7 days |
Day length: | 9.0 - 9.3 hours | |
![]() |
Number of rainy days: | 1 day |
Precipitation totals: | 0.6 in. | |
more information |
forecast
Lake Geneva |
temperature
Lake Geneva |
Air temperature in December, °F
Day temperature | Night temperature |
The highest day temperature during December of 2024 was 45°F. At the same time the lowest night temperature was 4°F. Daily and nightly averages during December were 31.5°F and 25.8°F.
Sea water temperature in Lake Geneva in December, °F
The average sea water temperature in December of 2024 was 32.0°F. The highest and lowest sea temperatures during the month were 32.0°F and 32.0°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 Lake Geneva in December is 0.6 in. Other months of the year show relatively similar values.
The average wind speed value in December is 9.9 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: 3.5.
Best time for vacation in Lake Geneva
Lake Geneva on a weather map

11 mph

7 mph

5 mph

5 mph

6 mph

6 mph

6 mph

7 mph