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.
Overnight
54°F
Chance Rain Showers
A chance of rain showers. Mostly cloudy. Low around 54, with temperatures rising to around 58 overnight. South wind around 9 mph. Chance of precipitation is 30%. New rainfall amounts less than a tenth of an inch possible.
7-day forecast for French Island
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 54°F | Chance Rain Showers | 9 mph S | 25% |
| Wednesday | 59°F | Chance Rain Showers then Mostly Cloudy | 9 to 13 mph SW | 34% |
| Wednesday Night | 46°F | Rain Showers Likely | 7 to 13 mph W | 72% |
| Thursday | 53°F | Chance Rain Showers then Cloudy | 14 mph N | 44% |
| Thursday Night | 36°F | Mostly Cloudy | 8 to 14 mph N | 2% |
| Friday | 48°F | Mostly Sunny | 3 to 8 mph N | 0% |
| Friday Night | 29°F | Mostly Clear | 2 mph N | 0% |
| Saturday | 51°F | Mostly Sunny | 0 to 5 mph W | 0% |
| Saturday Night | 35°F | Mostly Clear | 2 mph W | 3% |
| Sunday | 56°F | Sunny | 2 to 6 mph W | 5% |
| Sunday Night | 36°F | Mostly Clear | 2 mph SW | 0% |
| Monday | 61°F | Mostly Sunny | 2 to 8 mph SW | 1% |
| Monday Night | 40°F | Mostly Clear | 1 to 5 mph W | 0% |
| Tuesday | 59°F | Sunny | 3 mph NW | 0% |
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 Nov 4, 2026.