Average First Frost Dates for Pennsylvania

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

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List of Average First Frost Dates for Locations in Pennsylvania

LocationAverage First Frost Dates
AllentownOct. 11 - Oct. 20
Allison ParkOct. 21 - Oct. 31
Allison ParkOct. 21 - Oct. 31
AltoonaOct. 11 - Oct. 20
BaldwinOct. 21 - Oct. 31
Bethel ParkOct. 21 - Oct. 31
BethlehemOct. 11 - Oct. 20
BroomallOct. 21 - Oct. 31
Bryn MawrOct. 21 - Oct. 31
CarlisleOct. 21 - Oct. 31
ChambersburgOct. 11 - Oct. 20
ChesterNov. 1 - Nov. 10
ChurchvilleOct. 21 - Oct. 31
Colonial ParkOct. 21 - Oct. 31
Drexel HillNov. 1 - Nov. 10
EastonOct. 11 - Oct. 20
ErieNov. 1 - Nov. 10
Franklin ParkOct. 21 - Oct. 31
FullertonOct. 11 - Oct. 20
HanoverOct. 21 - Oct. 31
HarrisburgOct. 21 - Oct. 31
HazletonOct. 1 - Oct. 10
HermitageOct. 11 - Oct. 20
HorshamOct. 21 - Oct. 31
JohnstownOct. 11 - Oct. 20
King of PrussiaOct. 21 - Oct. 31
LancasterOct. 21 - Oct. 31
LansdaleOct. 11 - Oct. 20
LebanonOct. 21 - Oct. 31
LevittownOct. 21 - Oct. 31
McKeesportOct. 11 - Oct. 20
MonroevilleOct. 21 - Oct. 31
MurrysvilleOct. 11 - Oct. 20
New CastleOct. 11 - Oct. 20
NorristownOct. 21 - Oct. 31
PaoliOct. 11 - Oct. 20
PhiladelphiaNov. 1 - Nov. 10
PhoenixvilleOct. 11 - Oct. 20
PittsburghOct. 21 - Oct. 31
PlumOct. 21 - Oct. 31
PottstownOct. 11 - Oct. 20
ReadingOct. 11 - Oct. 20
ScrantonOct. 11 - Oct. 20
State CollegeOct. 21 - Oct. 31
WeigelstownOct. 21 - Oct. 31
West ChesterOct. 21 - Oct. 31
West MifflinOct. 21 - Oct. 31
WhitehallOct. 21 - Oct. 31
Wilkes-BarreOct. 11 - Oct. 20
WilliamsportOct. 11 - Oct. 20
YorkOct. 21 - Oct. 31

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