Onalaska, WI Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Onalaska, a city in La Crosse County, Wisconsin.
This Afternoon
66°F
Rain Showers
Rain showers. Cloudy, with a high near 66. South wind 8 to 13 mph, with gusts as high as 23 mph. Chance of precipitation is 90%. New rainfall amounts less than a tenth of an inch possible.
7-day forecast for Onalaska
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 66°F | Rain Showers | 8 to 13 mph S | 85% |
| Tonight | 55°F | Rain Showers | 9 mph SE | 91% |
| Wednesday | 57°F | Rain Showers Likely | 8 to 13 mph S | 86% |
| Wednesday Night | 46°F | Rain Showers | 13 mph W | 84% |
| Thursday | 50°F | Rain Showers Likely | 13 mph NW | 68% |
| Thursday Night | 38°F | Mostly Cloudy | 13 mph N | 11% |
| Friday | 50°F | Partly Sunny | 6 to 13 mph N | 1% |
| Friday Night | 31°F | Partly Cloudy | 2 mph N | 1% |
| Saturday | 53°F | Mostly Sunny | 0 to 5 mph W | 2% |
| Saturday Night | 35°F | Partly Cloudy | 2 mph W | 5% |
| Sunday | 57°F | Mostly Sunny | 2 to 8 mph W | 6% |
| Sunday Night | 36°F | Partly Cloudy | 3 mph SW | 1% |
| Monday | 62°F | Mostly Sunny | 3 to 9 mph SW | 1% |
| Monday Night | 39°F | Partly Cloudy | 5 mph W | 0% |
Forecast source: National Weather Service (api.weather.gov) for Onalaska (43.890, -91.204). Updated through the day.
Growing snapshot for Onalaska
Last spring frost
Apr 23
First fall frost
Oct 17
Growing season
177 days
Hardiness zone
5a
More local growing data for Onalaska: nearby ZIP 54650 weather · frost dates · planting calendar · Wisconsin frost dates
Nearby towns & communities
Bangor
Brice Prairie
Coon Valley
French Island
Holmen
La Crosse
Mindoro
Rockland
St. Joseph
West Salem
Climate data from the nearest NOAA station, La Crosse Muni Ap, Wi (2.5 mi from Onalaska). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 3, 2026.