Last frost date in Carlisle, Pennsylvania
April 23
Average last frost in spring. In an early year (1 in 10) it's over by April 9; in a late year (1 in 10) it comes after May 9.
October 18
Average first frost in fall. 1 year in 10 it comes by October 4.
Source: NOAA U.S. Climate Normals 1991–2020, station Carlisle Wtp (USC00361920), 1.9 miles from Carlisle, elevation 430 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 9 | Apr 23 | May 9 |
| First frost in fall | Oct 4 | Oct 18 | Nov 2 |
Frost-free days in an average year: 177
| Chance in a year | Average last in spring | Average first in fall | |
|---|---|---|---|
| Light frost (36°F) | Every year | May 3 | Oct 6 |
| Frost (32°F) | Every year | Apr 23 | Oct 18 |
| Hard freeze (28°F) | Every year | Apr 10 | Nov 1 |
Nights at 32°F or colder in an average year: 127
What to plant now in Carlisle
- Spring planting calendar for an average last frost around April 20 Carlisle: April 23
- Fall planting calendar for an average first frost around October 20 Carlisle: October 18
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
- Mechanicsburg 10 mi · last frost Apr 9
- Harrisburg 18 mi · last frost Apr 15
- Hanover 29 mi · last frost Apr 24
- York 30 mi · last frost Apr 26
- Chambersburg 30 mi · last frost Apr 18