Onalaska, WI Weather & Growing Conditions
This Afternoon
68°F
Rain Showers
Rain showers. Cloudy. High near 68, with temperatures falling to around 66 in the afternoon. South wind around 10 mph, with gusts as high as 22 mph. Chance of precipitation is 80%. New rainfall amounts between a tenth and quarter of an inch possible.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 68°F | Rain Showers | 10 mph S | 81% |
| Tonight | 56°F | Rain Showers | 8 mph SE | 98% |
| Wednesday | 58°F | Rain Showers | 7 to 13 mph S | 88% |
| Wednesday Night | 47°F | Rain Showers | 13 mph SW | 87% |
| Thursday | 50°F | Rain Showers Likely | 12 mph NW | 71% |
| Thursday Night | 39°F | Mostly Cloudy | 7 to 10 mph N | 10% |
| Friday | 50°F | Partly Sunny | 3 to 8 mph N | 2% |
| Friday Night | 32°F | Partly Cloudy | 2 mph N | 1% |
| Saturday | 54°F | Mostly Sunny | 0 to 5 mph W | 0% |
| Saturday Night | 36°F | Partly Cloudy | 3 mph W | 9% |
| Sunday | 59°F | Slight Chance Rain Showers then Mostly Sunny | 3 to 8 mph W | 15% |
| Sunday Night | 37°F | Mostly Clear | 5 mph SW | 4% |
| Monday | 62°F | Mostly Sunny | 5 to 10 mph SW | 0% |
| Monday Night | 40°F | Partly Cloudy | 6 mph W | 1% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for Onalaska, WI
Last spring frost
Apr 23
First fall frost
Oct 17
Growing season
177 days
Hardiness zone
5a
Explore more for Onalaska, WI: full frost dates · planting calendar · Wisconsin frost dates
Climate data from the nearest NOAA station, La Crosse Muni Ap, Wi (2.5 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 3, 2026.