Last frost date in Fort Atkinson, Wisconsin
April 28
Average last frost in spring. In an early year (1 in 10) it's over by April 14; in a late year (1 in 10) it comes after May 17.
October 13
Average first frost in fall. 1 year in 10 it comes by September 29.
Source: NOAA U.S. Climate Normals 1991–2020, station Ft Atkinson (USC00472869), 1.5 miles from Fort Atkinson, elevation 800 ft. NOAA National Centers for Environmental Information. These are long-term averages, not a forecast.
| Early year | Average | Late year | |
|---|---|---|---|
| Last frost in spring | Apr 14 | Apr 28 | May 17 |
| First frost in fall | Sept 29 | Oct 13 | Oct 26 |
Frost-free days in an average year: 166
| Chance in a year | Average last in spring | Average first in fall | |
|---|---|---|---|
| Light frost (36°F) | Every year | May 10 | Oct 2 |
| Frost (32°F) | Every year | Apr 28 | Oct 13 |
| Hard freeze (28°F) | Every year | Apr 16 | Oct 24 |
Nights at 32°F or colder in an average year: 146
What to plant now in Fort Atkinson
- Spring planting calendar for an average last frost around April 30 Fort Atkinson: April 28
- Fall planting calendar for an average first frost around October 10 Fort Atkinson: October 13
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
- Whitewater 8 mi · last frost May 2
- Janesville 19 mi · last frost Apr 26
- Stoughton 19 mi · last frost Apr 30
- Watertown 19 mi · last frost Apr 28
- Oconomowoc 22 mi · last frost Apr 30