Frost dates for Pennsylvania
In Pennsylvania, the typical last spring frost runs from Apr 2 in Philadelphia to Apr 26 in Erie. The typical first fall frost runs from Oct 20 in Scranton to Nov 10 in Philadelphia.
So far this fall, 0 of the 6 cities in Pennsylvania that file a daily climate report have logged a freeze.
NCEI U.S. Climate Normals 1991-2020, annual/seasonal (c20230404)
Frost dates by city in Pennsylvania
| City | Last spring | First fall | Season | This fall |
|---|---|---|---|---|
| Allentown | Apr 20 | Oct 24 | 184 days | No freeze yet |
| Erie | Apr 26 | Nov 4 | 192 days | No freeze yet |
| Harrisburg | Apr 9 | Nov 1 | 205 days | No freeze yet |
| Philadelphia | Apr 2 | Nov 10 | 224 days | No freeze yet |
| Pittsburgh | Apr 23 | Oct 23 | 181 days | No freeze yet |
| Scranton | Apr 23 | Oct 20 | 178 days | No freeze yet |
A typical date is the median: half of years have an earlier last spring frost, half a later one. An early year means 1 year in 10, and a late year means 1 year in 10. Dates come from the U.S. Climate Normals for 1991-2020, published by NOAA's National Centers for Environmental Information, using a daily low of 32F or below as a freeze.
Frost dates by ZIP code and city
The daily climate report is issued by the local National Weather Service forecast office and delivered to this page by the Iowa Environmental Mesonet of Iowa State University. Under 17 U.S.C. 105, no copyright attaches to the government-produced figures on this page, including reports, alerts, station observations, and normals, which were created by the National Weather Service and other NOAA offices. The notice that 17 U.S.C. 403 requires appears in this sentence. It does not imply endorsement by or affiliation with those agencies. See: Data sources and attribution.