French Island, WI Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for French Island, a community in La Crosse County, Wisconsin.
This Afternoon
65°F
Showers And Thunderstorms Likely
Showers and thunderstorms likely. Mostly cloudy. High near 65, with temperatures falling to around 63 in the afternoon. East wind 6 to 10 mph, with gusts as high as 18 mph. Chance of precipitation is 70%. New rainfall amounts between a quarter and half of an inch possible.
7-day forecast for French Island
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 65°F | Showers And Thunderstorms Likely | 6 to 10 mph E | 73% |
| Tonight | 57°F | Showers And Thunderstorms | 9 to 14 mph E | 90% |
| Saturday | 68°F | Showers And Thunderstorms Likely | 6 to 9 mph E | 67% |
| Saturday Night | 55°F | Rain Showers Likely | 10 mph NE | 67% |
| Sunday | 68°F | Partly Sunny | 12 mph NE | 12% |
| Sunday Night | 49°F | Mostly Cloudy | 9 mph NE | 6% |
| Monday | 63°F | Mostly Cloudy then Chance Rain Showers | 10 mph NE | 32% |
| Monday Night | 45°F | Chance Rain Showers | 3 to 8 mph NE | 32% |
| Tuesday | 62°F | Partly Sunny | 3 to 7 mph NE | 11% |
| Tuesday Night | 44°F | Partly Cloudy | 1 to 5 mph NE | 4% |
| Wednesday | 66°F | Sunny | 3 mph E | 1% |
| Wednesday Night | 48°F | Partly Cloudy | 2 mph E | 3% |
| Thursday | 69°F | Partly Sunny | 2 mph S | 7% |
| Thursday Night | 50°F | Partly Cloudy | 0 mph | 7% |
Forecast source: National Weather Service (api.weather.gov) for French Island (43.859, -91.261). Updated through the day.
Growing snapshot for French Island
Last spring frost
Apr 23
First fall frost
Oct 17
Growing season
177 days
Hardiness zone
5a
More local growing data for French Island: nearby ZIP 54603 weather · frost dates · planting calendar · Wisconsin frost dates
Nearby towns & communities
Climate data from the nearest NOAA station, La Crosse Muni Ap, Wi (1.5 mi from French Island). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 18, 2026.