Fontana-on-Geneva Lake, WI Weather & Growing Conditions
Today
62°F
Isolated Rain Showers
Isolated rain showers. Cloudy. High near 62, with temperatures falling to around 53 in the afternoon. Southwest wind around 15 mph. Chance of precipitation is 20%. New rainfall amounts less than a tenth of an inch possible.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 62°F | Isolated Rain Showers | 15 mph SW | 16% |
| Tonight | 44°F | Isolated Rain Showers then Cloudy | 10 to 15 mph SW | 15% |
| Thursday | 54°F | Chance Rain Showers then Chance Light Rain | 10 to 15 mph W | 50% |
| Thursday Night | 38°F | Chance Light Rain then Mostly Cloudy | 10 mph NW | 44% |
| Friday | 48°F | Partly Sunny | 5 to 10 mph N | 9% |
| Friday Night | 31°F | Partly Cloudy | 0 to 5 mph N | 0% |
| Saturday | 50°F | Sunny | 0 to 5 mph NW | 0% |
| Saturday Night | 33°F | Mostly Clear | 0 to 5 mph W | 1% |
| Sunday | 55°F | Sunny | 5 to 10 mph W | 7% |
| Sunday Night | 35°F | Mostly Clear | 0 to 5 mph W | 0% |
| Monday | 59°F | Mostly Sunny | 0 to 10 mph SW | 0% |
| Monday Night | 39°F | Mostly Clear | 5 mph W | 0% |
| Tuesday | 60°F | Sunny | 5 mph NW | 1% |
| Tuesday Night | 38°F | Partly Cloudy | 0 mph | 1% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for Fontana-on-Geneva Lake, WI
Last spring frost
Apr 25
First fall frost
Oct 21
Growing season
179 days
Hardiness zone
5b
Explore more for Fontana-on-Geneva Lake, WI: full frost dates · planting calendar · Wisconsin frost dates
Climate data from the nearest NOAA station, Lake Geneva Wwtp, Wi (7.9 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 4, 2026.