Last frost date in Watertown, 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 13.
October 12
Average first frost in fall. 1 year in 10 it comes by September 28.
Source: NOAA U.S. Climate Normals 1991–2020, station Watertown Wwtp (USC00478919), 1.1 miles from Watertown, elevation 825 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 13 |
| First frost in fall | Sept 28 | Oct 12 | Oct 27 |
Frost-free days in an average year: 167
| Chance in a year | Average last in spring | Average first in fall | |
|---|---|---|---|
| Light frost (36°F) | Every year | May 9 | Oct 2 |
| Frost (32°F) | Every year | Apr 28 | Oct 12 |
| Hard freeze (28°F) | Every year | Apr 16 | Oct 25 |
Nights at 32°F or colder in an average year: 149
What to plant now in Watertown
- Spring planting calendar for an average last frost around April 30 Watertown: April 28
- Fall planting calendar for an average first frost around October 10 Watertown: October 12
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
- Oconomowoc 13 mi · last frost Apr 30
- Fort Atkinson 19 mi · last frost Apr 28
- Hartford 20 mi · last frost May 8
- Beaver Dam 20 mi · last frost May 2
- Whitewater 24 mi · last frost May 2
Updated