Last frost date in Cedarburg, Wisconsin
April 23
Average last frost in spring. In an early year (1 in 10) it's over by April 10; in a late year (1 in 10) it comes after May 9.
October 24
Average first frost in fall. 1 year in 10 it comes by October 8.
Source: NOAA U.S. Climate Normals 1991–2020, station Grafton Wwtp (USC00473198), 1.8 miles from Cedarburg, elevation 741 ft. NOAA National Centers for Environmental Information. These are long-term averages, not a forecast.
This station is also the nearest one for Grafton, so its frost dates are the same as Cedarburg's.
| Early year | Average | Late year | |
|---|---|---|---|
| Last frost in spring | Apr 10 | Apr 23 | May 9 |
| First frost in fall | Oct 8 | Oct 24 | Nov 5 |
Frost-free days in an average year: 182
| Chance in a year | Average last in spring | Average first in fall | |
|---|---|---|---|
| Light frost (36°F) | Every year | May 5 | Oct 11 |
| Frost (32°F) | Every year | Apr 23 | Oct 24 |
| Hard freeze (28°F) | Every year | Apr 11 | Nov 2 |
Nights at 32°F or colder in an average year: 134
What to plant now in Cedarburg
- Spring planting calendar for an average last frost around April 20 Cedarburg: April 23
- Fall planting calendar for an average first frost around October 20 Cedarburg: October 24
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
- Port Washington 8 mi · last frost Apr 27
- Menomonee Falls 12 mi · last frost May 6
- West Bend 13 mi · last frost May 1
- Milwaukee 16 mi · last frost Apr 26
- Sussex 17 mi · last frost Apr 30
Updated