Average Last Frost Dates for Pennsylvania

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Last Frost Dates were calculated using daily climate data from the period between 1991-2020.

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List of Average Last Frost Dates for Locations in Pennsylvania

LocationAverage Last Frost Dates
AllentownMay 11 - May 20
Allison ParkMay 1 - May 10
Allison ParkMay 1 - May 10
AltoonaMay 11 - May 20
BaldwinMay 1 - May 10
Bethel ParkMay 11 - May 20
BethlehemMay 11 - May 20
BroomallApr. 21 - Apr. 30
Bryn MawrApr. 21 - Apr. 30
CarlisleMay 1 - May 10
ChambersburgMay 1 - May 10
ChesterApr. 21 - Apr. 30
ChurchvilleMay 1 - May 10
Colonial ParkMay 1 - May 10
Drexel HillApr. 21 - Apr. 30
EastonMay 11 - May 20
ErieMay 11 - May 20
Franklin ParkMay 11 - May 20
FullertonMay 11 - May 20
HanoverMay 1 - May 10
HarrisburgMay 1 - May 10
HazletonMay 21 - May 31
HermitageMay 21 - May 31
HorshamMay 1 - May 10
JohnstownMay 11 - May 20
King of PrussiaApr. 21 - Apr. 30
LancasterMay 1 - May 10
LansdaleMay 1 - May 10
LebanonMay 11 - May 20
LevittownApr. 21 - Apr. 30
McKeesportMay 11 - May 20
MonroevilleMay 11 - May 20
MurrysvilleMay 11 - May 20
New CastleMay 21 - May 31
NorristownApr. 21 - Apr. 30
PaoliMay 11 - May 20
PhiladelphiaApr. 21 - Apr. 30
PhoenixvilleMay 1 - May 10
PittsburghMay 1 - May 10
PlumMay 11 - May 20
PottstownMay 1 - May 10
ReadingMay 1 - May 10
ScrantonMay 11 - May 20
State CollegeMay 11 - May 20
WeigelstownMay 1 - May 10
West ChesterMay 1 - May 10
West MifflinMay 1 - May 10
WhitehallMay 1 - May 10
Wilkes-BarreMay 11 - May 20
WilliamsportMay 11 - May 20
YorkMay 1 - May 10
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