Last frost date in Pottstown, Pennsylvania
April 20
Average last frost in spring. In an early year (1 in 10) it's over by April 5; in a late year (1 in 10) it comes after May 6.
October 23
Average first frost in fall. 1 year in 10 it comes by October 9.
Source: NOAA U.S. Climate Normals 1991–2020, station Pottstown Limerick AP (USW00054782), 4.7 miles from Pottstown, elevation 291 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 5 | Apr 20 | May 6 |
| First frost in fall | Oct 9 | Oct 23 | Nov 5 |
Frost-free days in an average year: 186
| Chance in a year | Average last in spring | Average first in fall | |
|---|---|---|---|
| Light frost (36°F) | Every year | May 2 | Oct 12 |
| Frost (32°F) | Every year | Apr 20 | Oct 23 |
| Hard freeze (28°F) | Every year | Apr 6 | Nov 3 |
Nights at 32°F or colder in an average year: 111
What to plant now in Pottstown
- Spring planting calendar for an average last frost around April 20 Pottstown: April 20
- Fall planting calendar for an average first frost around October 20 Pottstown: October 23
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
- Phoenixville 10 mi · last frost Apr 18
- Reading 16 mi · last frost Apr 14
- Norristown 18 mi · last frost Apr 8
- Lansdale 19 mi · last frost Apr 11
- West Chester 20 mi · last frost Apr 26
Updated