Last frost date in New Berlin, Wisconsin
May 3
Average last frost in spring. In an early year (1 in 10) it's over by April 18; in a late year (1 in 10) it comes after May 19.
October 14
Average first frost in fall. 1 year in 10 it comes by September 30.
Source: NOAA U.S. Climate Normals 1991–2020, station Hales Corners/whitnall Park/bo (USC00473391), 5.6 miles from New Berlin, elevation 774 ft. NOAA National Centers for Environmental Information. These are long-term averages, not a forecast.
This station is also the nearest one for Franklin, Greendale, Greenfield and Muskego, so their frost dates are the same as New Berlin's.
| Early year | Average | Late year | |
|---|---|---|---|
| Last frost in spring | Apr 18 | May 3 | May 19 |
| First frost in fall | Sept 30 | Oct 14 | Oct 26 |
Frost-free days in an average year: 162
| Chance in a year | Average last in spring | Average first in fall | |
|---|---|---|---|
| Light frost (36°F) | Every year | May 14 | Oct 3 |
| Frost (32°F) | Every year | May 3 | Oct 14 |
| Hard freeze (28°F) | Every year | Apr 21 | Oct 24 |
Nights at 32°F or colder in an average year: 159
What to plant now in New Berlin
- Spring planting calendar for an average last frost around April 30 New Berlin: May 3
- Fall planting calendar for an average first frost around October 10 New Berlin: October 14
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
- West Allis 6 mi · last frost Apr 26
- Waukesha 6 mi · last frost May 1
- Brookfield 6 mi · last frost Apr 30
- Milwaukee 10 mi · last frost Apr 26
- Sussex 12 mi · last frost Apr 30