The highest day temperature in January 2025 was 42°F. The lowest night temperature was -12°F. The average values for day and night temperatures during January were 22.3°F и 12.4°F respectivly.

The average sea surface temperature in January 2025 for Lake Geneva was 30.0°F. The maximum and minimum values were 30.0°F and 30.0°F respectively.

Most of the days in January are gloomy but you can also expect sunny days.

Precipitation total in January for Lake Geneva is 0.7 in. It makes january one of the least rainy months of the year.

The average wind speed in January is 10.0 mph.

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 January is 3.4 hours.