The highest day temperature in July 2026 was 104°F. The lowest night temperature was 55°F. The average values for day and night temperatures during July were 90.5°F и 68.2°F respectivly.

The average sea surface temperature in July 2026 for Lake Geneva was 30.0°F. The maximum and minimum values were 30.0°F and 30.0°F respectively.

You can expect various weather conditions during July. Be ready for sunny, cloudy or even gloomy days.

Precipitation total in July for Lake Geneva is 1.0 in.

The average wind speed in July is 7.4 mph. It makes July the most windless month of the year for Lake Geneva.

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 July is 9.4 hours.