Lake geneva weather forecast, usa. The warmest day over the next 25 days weather in lake geneva is forecast to be tuesday 21st june 2022 at 37°c (99°f) and the warmest night on monday 20th june 2022 at 25°c (77°f). The average temperature over the next 25 days in lake geneva from this forecast is 31°c (88°f) and there will be 5 days of. Get the forecast for today, tonight & tomorrow's weather for lake geneva, fl. Hi/low, realfeel®, precip, radar, & everything you need to be ready for the day, commute, and weekend! Find the most current and reliable 7 day weather forecasts, storm alerts, reports and information for [city] with the weather network. Be prepared for the day. Check the current conditions for lake geneva, wi for the day ahead, with radar, hourly, and up to the minute forecasts. As of 1:44 pm cdt. There is a marginal risk of severe weather today.