Last frost date in DeForest, Wisconsin
May 4
Average last frost in spring. In an early year (1 in 10) it's over by April 20; in a late year (1 in 10) it comes after May 18.
October 6
Average first frost in fall. 1 year in 10 it comes by September 23.
Source: NOAA U.S. Climate Normals 1991–2020, station Arlington (USC00470308), 5.3 miles from DeForest, elevation 1,052 ft. NOAA National Centers for Environmental Information. These are long-term averages, not a forecast.
This station is also the nearest one for Windsor, so its frost dates are the same as DeForest's.
| Early year | Average | Late year | |
|---|---|---|---|
| Last frost in spring | Apr 20 | May 4 | May 18 |
| First frost in fall | Sept 23 | Oct 6 | Oct 20 |
Frost-free days in an average year: 154
| Chance in a year | Average last in spring | Average first in fall | |
|---|---|---|---|
| Light frost (36°F) | Every year | May 14 | Sept 28 |
| Frost (32°F) | Every year | May 4 | Oct 6 |
| Hard freeze (28°F) | Every year | Apr 22 | Oct 18 |
Nights at 32°F or colder in an average year: 164
What to plant now in DeForest
- Spring planting calendar for an average last frost around April 30 DeForest: May 4
- Fall planting calendar for an average first frost around October 10 DeForest: October 6
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
- Sun Prairie 6 mi · last frost May 1
- Madison 11 mi · last frost May 1
- Middleton 12 mi · last frost Apr 28
- Stoughton 22 mi · last frost Apr 30
- Baraboo 26 mi · last frost May 5
Updated