Frost dates · 13 cities · zones 6b–7b
Pennsylvania frost dates, city by city
Median last spring frost across 13 Pennsylvania cities runs from March 30 in Philadelphia to April 26 in York.
| City | Zone | Last frost median | First frost median | Season | Jan → Dec |
|---|---|---|---|---|---|
| Philadelphia | 7b | Mar 30 | Nov 17 | 232 d | |
| Pittsburgh | 6b | Apr 18 | Oct 28 | 193 d | |
| Allentown | 7a | Apr 20 | Oct 24 | 184 d | |
| Reading | 7a | Apr 14 | Oct 29 | 197 d | |
| Erie | 7a | Apr 26 | Nov 4 | 192 d | |
| Bethlehem | 7a | Apr 20 | Oct 24 | 184 d | |
| Scranton | 6b | Apr 23 | Oct 20 | 178 d | |
| Lancaster | 7a | Apr 19 | Oct 24 | 186 d | |
| Harrisburg | 7a | Apr 15 | Oct 23 | 189 d | |
| York | 7a | Apr 26 | Oct 19 | 177 d | |
| Wilkes-Barre | 7a | Apr 23 | Oct 20 | 178 d | |
| Altoona | 6b | Apr 25 | Oct 21 | 176 d | |
| State College | 6b | Apr 20 | Oct 26 | 187 d |
Medians from NOAA NCEI 1991–2020 U.S. Climate Normals at each city's nearest qualifying station; zones from the 2023 USDA Plant Hardiness Zone Map. Open a city for the 1-in-10-year dates, the station, and a planting calendar for every sauce crop.
All states →Build a plan from your ZIP →Earliest: Philadelphia (Mar 30) · Latest: York (Apr 26)