Last frost date in Green Bay, Wisconsin
May 7
Average last frost in spring. In an early year (1 in 10) it's over by April 24; in a late year (1 in 10) it comes after May 22.
October 9
Average first frost in fall. 1 year in 10 it comes by September 23.
Source: NOAA U.S. Climate Normals 1991–2020, station Green Bay Botanical (USC00473271), 5.6 miles from Green Bay, elevation 694 ft. NOAA National Centers for Environmental Information. These are long-term averages, not a forecast.
This station is also the nearest one for Howard and Suamico, so their frost dates are the same as Green Bay's.
| Early year | Average | Late year | |
|---|---|---|---|
| Last frost in spring | Apr 24 | May 7 | May 22 |
| First frost in fall | Sept 23 | Oct 9 | Oct 25 |
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 19 | Sept 28 |
| Frost (32°F) | Every year | May 7 | Oct 9 |
| Hard freeze (28°F) | Every year | Apr 27 | Oct 25 |
Nights at 32°F or colder in an average year: 159
What to plant now in Green Bay
- Spring planting calendar for an average last frost around May 10 Green Bay: May 7
- Fall planting calendar for an average first frost around October 10 Green Bay: October 9
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
- De Pere 8 mi · last frost Apr 30
- Hobart 9 mi · last frost May 1
- Appleton 26 mi · last frost May 4
- Two Rivers 32 mi · last frost Apr 27
- Manitowoc 33 mi · last frost Apr 30
Updated