The highest day temperature in December 2023 was 54°F. The lowest night temperature was 20°F. The average values for day and night temperatures during December were 44.4°F и 39.2°F respectivly.

The average sea surface temperature in December 2023 for Lake Geneva was 48.6°F. The maximum and minimum values were 46.8°F and 50.4°F respectively.

Most of the days in December are sunny but you can also expect cloudy and gloomy days.

Precipitation total in December for Lake Geneva is 4.9 in. It makes december the most rainy month of the year.

The average wind speed in December is 5.9 mph. This value is relatively stable throughout the year.

We are using day length and cloud cover information for each day of the month to calculate averages for this chart. Average sunny hours for Lake Geneva in December is 4.9 hours.