Last frost date in Onalaska, Wisconsin
April 23
Average last frost in spring. In an early year (1 in 10) it's over by April 9; in a late year (1 in 10) it comes after May 6.
October 17
Average first frost in fall. 1 year in 10 it comes by October 3.
Source: NOAA U.S. Climate Normals 1991–2020, station La Crosse Muni AP (USW00014920), 2.5 miles from Onalaska, elevation 652 ft. NOAA National Centers for Environmental Information. These are long-term averages, not a forecast.
This station is also the nearest one for Holmen, so its frost dates are the same as Onalaska's.
| Early year | Average | Late year | |
|---|---|---|---|
| Last frost in spring | Apr 9 | Apr 23 | May 6 |
| First frost in fall | Oct 3 | Oct 17 | Nov 1 |
Frost-free days in an average year: 177
| Chance in a year | Average last in spring | Average first in fall | |
|---|---|---|---|
| Light frost (36°F) | Every year | May 4 | Oct 6 |
| Frost (32°F) | Every year | Apr 23 | Oct 17 |
| Hard freeze (28°F) | Every year | Apr 12 | Oct 28 |
Nights at 32°F or colder in an average year: 141
What to plant now in Onalaska
- Spring planting calendar for an average last frost around April 20 Onalaska: April 23
- Fall planting calendar for an average first frost around October 20 Onalaska: October 17
Planting dates: USDA Home and Garden Bulletin No. 9 (1967), “Suburban and Farm Vegetable Gardens,” tables 4 and 5. How we match the table.
Nearby in Wisconsin
- La Crosse 5 mi · last frost Apr 27
- Reedsburg 65 mi · last frost May 2
- Eau Claire 66 mi · last frost Apr 24
- Chippewa Falls 73 mi · last frost May 8
- Marshfield 74 mi · last frost May 5
Updated