Fontana-on-Geneva Lake, WI Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Fontana-on-Geneva Lake, a village in Walworth County, Wisconsin.
Today
71°F
Showers And Thunderstorms
Showers and thunderstorms before 11am, then a chance of showers and thunderstorms between 11am and noon, then showers and thunderstorms. Cloudy, with a high near 71. Southeast wind 5 to 10 mph. Chance of precipitation is 100%. New rainfall amounts between a half and three quarters of an inch possible.
7-day forecast for Fontana-on-Geneva Lake
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 71°F | Showers And Thunderstorms | 5 to 10 mph SE | 100% |
| Tonight | 60°F | Showers And Thunderstorms | 5 to 10 mph E | 86% |
| Sunday | 64°F | Rain Showers | 10 to 15 mph NE | 78% |
| Sunday Night | 53°F | Cloudy | 10 to 15 mph NE | 13% |
| Monday | 62°F | Slight Chance Rain Showers | 10 to 15 mph NE | 24% |
| Monday Night | 49°F | Slight Chance Rain Showers then Mostly Cloudy | 5 to 15 mph NE | 15% |
| Tuesday | 61°F | Partly Sunny | 10 to 15 mph NE | 13% |
| Tuesday Night | 48°F | Partly Cloudy | 5 to 10 mph NE | 6% |
| Wednesday | 63°F | Mostly Sunny | 5 to 10 mph NE | 5% |
| Wednesday Night | 50°F | Partly Cloudy | 0 to 5 mph NE | 1% |
| Thursday | 66°F | Mostly Sunny | 5 mph NE | 4% |
| Thursday Night | 50°F | Partly Cloudy | 0 to 5 mph NE | 4% |
| Friday | 69°F | Mostly Sunny | 0 to 5 mph NE | 3% |
| Friday Night | 51°F | Partly Cloudy | 0 to 5 mph NE | 3% |
Forecast source: National Weather Service (api.weather.gov) for Fontana-on-Geneva Lake (42.545, -88.566). Updated through the day.
Growing snapshot for Fontana-on-Geneva Lake
Last spring frost
Apr 25
First fall frost
Oct 21
Growing season
179 days
Hardiness zone
5b
More local growing data for Fontana-on-Geneva Lake: nearby ZIP 53125 weather · frost dates · planting calendar · Wisconsin frost dates
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Climate data from the nearest NOAA station, Lake Geneva Wwtp, Wi (7.9 mi from Fontana-on-Geneva Lake). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.