Last frost date in Hermitage, Pennsylvania
May 15
Average last frost in spring. In an early year (1 in 10) it's over by April 30; in a late year (1 in 10) it comes after June 1.
October 3
Average first frost in fall. 1 year in 10 it comes by September 19.
Source: NOAA U.S. Climate Normals 1991–2020, station Mercer (USC00365651), 10.7 miles from Hermitage, elevation 1,220 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 30 | May 15 | June 1 |
| First frost in fall | Sept 19 | Oct 3 | Oct 19 |
Frost-free days in an average year: 140
| Chance in a year | Average last in spring | Average first in fall | |
|---|---|---|---|
| Light frost (36°F) | Every year | May 27 | Sept 23 |
| Frost (32°F) | Every year | May 15 | Oct 3 |
| Hard freeze (28°F) | Every year | May 3 | Oct 13 |
Nights at 32°F or colder in an average year: 159
What to plant now in Hermitage
- Spring planting calendar for an average last frost around May 10 Hermitage: May 15
- Fall planting calendar for an average first frost around September 30 Hermitage: October 3
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
- Sharon 3 mi · last frost May 1
- New Castle 17 mi · last frost Apr 30
- Meadville 33 mi · last frost Apr 30
- Butler 38 mi · last frost May 7
- Franklin Park 48 mi · last frost Apr 24
Updated