Last frost date in Butler, Pennsylvania
May 7
Average last frost in spring. In an early year (1 in 10) it's over by April 22; in a late year (1 in 10) it comes after May 23.
October 14
Average first frost in fall. 1 year in 10 it comes by October 1.
Source: NOAA U.S. Climate Normals 1991–2020, station Butler 2 SW (USC00361139), 1.7 miles from Butler, elevation 1,000 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 22 | May 7 | May 23 |
| First frost in fall | Oct 1 | Oct 14 | Oct 30 |
Frost-free days in an average year: 159
| Chance in a year | Average last in spring | Average first in fall | |
|---|---|---|---|
| Light frost (36°F) | Every year | May 19 | Oct 3 |
| Frost (32°F) | Every year | May 7 | Oct 14 |
| Hard freeze (28°F) | Every year | Apr 26 | Oct 27 |
Nights at 32°F or colder in an average year: 140
What to plant now in Butler
- Spring planting calendar for an average last frost around May 10 Butler: May 7
- Fall planting calendar for an average first frost around October 10 Butler: 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 Pennsylvania
- New Kensington 21 mi · last frost Apr 16
- Franklin Park 21 mi · last frost Apr 24
- New Castle 25 mi · last frost Apr 30
- Plum 26 mi · last frost Apr 16
- Wilkinsburg 29 mi · last frost Apr 5
Updated