Pennsylvania frost dates by county and ZIP code
Across 1,833 Pennsylvania ZIP codes the average last spring frost runs Mar 30 to May 24 and the average first fall frost Sep 27 to Nov 17 (50% odds, 32°F, NOAA 1991–2020 normals), with USDA hardiness zones. Download the table as CSV.
Counties
- Adams
- Allegheny
- Armstrong
- Beaver
- Bedford
- Berks
- Blair
- Bradford
- Bucks
- Butler
- Cambria
- Cameron
- Carbon
- Centre
- Chester
- Clarion
- Clearfield
- Clinton
- Columbia
- Crawford
- Cumberland
- Dauphin
- Delaware
- Elk
- Erie
- Fayette
- Forest
- Franklin
- Fulton
- Greene
- Huntingdon
- Indiana
- Jefferson
- Juniata
- Lackawanna
- Lancaster
- Lawrence
- Lebanon
- Lehigh
- Luzerne
- Lycoming
- McKean
- Mercer
- Mifflin
- Monroe
- Montgomery
- Montour
- Northampton
- Northumberland
- Perry
- Philadelphia
- Pike
- Potter
- Schuylkill
- Snyder
- Somerset
- Sullivan
- Susquehanna
- Tioga
- Union
- Venango
- Warren
- Washington
- Wayne
- Westmoreland
- Wyoming
- York
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