Ice Dam Prevention in Pennsylvania
In Pennsylvania, local ice dams deadlines run from Oct 16 to Nov 15, with a median around Nov 15 — a spread of weeks that a single statewide date would miss. Find your city below; each links to local freeze odds, a live 10-day outlook, and a checklist.
Notable cities
- Pittsburgh — earliest deadline in the state
- York — latest deadline in the state
- Philadelphia — near the state median
All Pennsylvania cities
| City | Local deadline | Median first 28°F | ||
|---|---|---|---|---|
| Pittsburgh | Oct 16 | Nov 5 | View → | Checklist |
| Erie | Oct 16 | Nov 16 | View → | Checklist |
| Scranton | Oct 16 | Nov 3 | View → | Checklist |
| Altoona | Oct 16 | Nov 3 | View → | Checklist |
| State College | Oct 16 | Nov 5 | View → | Checklist |
| Wilkes-Barre | Oct 16 | Nov 3 | View → | Checklist |
| Philadelphia | Nov 15 | Nov 29 | View → | Checklist |
| Allentown | Nov 15 | Nov 4 | View → | Checklist |
| Reading | Nov 15 | Nov 8 | View → | Checklist |
| Bethlehem | Nov 15 | Nov 4 | View → | Checklist |
| Lancaster | Nov 15 | Nov 4 | View → | Checklist |
| Harrisburg | Nov 15 | Nov 5 | View → | Checklist |
| York | Nov 15 | Oct 31 | View → | Checklist |
Back to the national Ice Dam Prevention guide, or see the methodology.
Data: NOAA NCEI 1991–2020 U.S. Climate Normals; live outlook by Open-Meteo. Last updated: July 11, 2026.