Onalaska, WI Weather & Growing Conditions
Overnight
57°F
Showers And Thunderstorms
Showers and thunderstorms. Some of the storms could produce heavy rain. Cloudy, with a low around 57. East wind around 12 mph, with gusts as high as 23 mph. Chance of precipitation is 100%. New rainfall amounts between 1 and 2 inches possible.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 57°F | Showers And Thunderstorms | 12 mph E | 97% |
| Saturday | 65°F | Showers And Thunderstorms Likely | 6 to 9 mph E | 78% |
| Saturday Night | 55°F | Chance Showers And Thunderstorms then Cloudy | 7 to 10 mph NE | 30% |
| Sunday | 70°F | Partly Sunny | 13 mph NE | 3% |
| Sunday Night | 48°F | Mostly Cloudy | 7 to 12 mph NE | 4% |
| Monday | 64°F | Mostly Cloudy | 9 mph NE | 8% |
| Monday Night | 45°F | Mostly Cloudy | 7 mph NE | 6% |
| Tuesday | 64°F | Mostly Sunny | 5 to 8 mph NE | 6% |
| Tuesday Night | 43°F | Mostly Clear | 5 mph NE | 2% |
| Wednesday | 67°F | Sunny | 2 to 6 mph E | 1% |
| Wednesday Night | 46°F | Mostly Clear | 3 mph E | 2% |
| Thursday | 68°F | Mostly Sunny | 3 mph E | 6% |
| Thursday Night | 49°F | Partly Cloudy | 1 mph E | 3% |
| Friday | 71°F | Mostly Sunny | 3 mph E | 3% |
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 Sep 19, 2026.