Pennsylvania Frost Dates
The median last spring freeze and first fall freeze (32°F) at 160 NOAA stations in Pennsylvania, 1991-2020, with the growing season between them.
Every station
A median date has an even chance of a later freeze in spring or an earlier one in fall. Each town page gives the dates at 36, 32 and 28°F and every probability from 10 to 90 percent.
| Station | Elevation | Last freeze | First freeze | Season, days | Town page |
|---|---|---|---|---|---|
| Acmetonia Lock 3 | 748 ft | April 16 | November 1 | 199 | Cheswick |
| Allentown Intl AP | 390 ft | April 20 | October 24 | 187 | Catasauqua |
| Altoona 3 W | 1,320 ft | April 25 | October 21 | 179 | Altoona |
| Altoona 7 Sw | 1,180 ft | April 25 | October 20 | 178 | Duncansville |
| Altoona Blair CO AP | 1,480 ft | April 23 | October 21 | 181 | Martinsburg |
| Alvin R Bush Dam | 930 ft | April 29 | October 21 | 175 | Renovo |
| Avondale 2 N | 400 ft | April 19 | October 26 | 190 | Upland |
| Bear Gap | 1,015 ft | April 27 | October 20 | 176 | Marion Heights |
| Beaver Falls 1 Ne | 760 ft | April 27 | October 25 | 181 | Beaver Falls |
| Benton 3 Ne | 1,095 ft | May 4 | October 11 | 160 | Benton |
| Biglerville | 720 ft | April 15 | October 27 | 195 | Biglerville |
| Bloserville 1 N | 700 ft | April 18 | October 26 | 191 | Newville |
| Blue Marsh Lake | 350 ft | April 26 | October 19 | 176 | Spring Ridge |
| Braddock Lock 2 | 730 ft | April 5 | November 10 | 219 | Duquesne |
| Bradford 4SW Rsch 5 | 1,660 ft | May 18 | October 4 | 139 | Lewis Run |
| Bradford Rgnl AP | 2,117 ft | May 18 | October 1 | 136 | Lewis Run |
| Bucksville | 387 ft | April 29 | October 16 | 170 | Bedminster |
| Butler 2 Sw | 1,000 ft | May 7 | October 14 | 160 | Oak Hills |
| Canton | 1,140 ft | May 16 | October 2 | 139 | Canton |
| Carlisle Wtp | 430 ft | April 23 | October 18 | 178 | Schlusser |
| Cashtown 1S | 710 ft | April 28 | October 17 | 172 | Arendtsville |
| Chalk Hill 2 Ene | 1,980 ft | May 19 | October 1 | 135 | Farmington |
| Chambersburg 1 Ese | 640 ft | April 18 | October 25 | 190 | Chambersburg |
| Chandlers Valley 1SE | 1,490 ft | May 22 | September 30 | 131 | Sugar Grove |
| Charleroi Lock 4 | 749 ft | April 13 | November 5 | 206 | Monessen |
| Clarence | 1,390 ft | May 21 | September 27 | 129 | Clarence |
| Clarion 3 Sw | 1,040 ft | May 9 | October 11 | 155 | Clarion |
| Clearfield Lawrence AP | 1,516 ft | May 4 | October 11 | 160 | Plymptonville |
| Clermont 1 Nw | 2,080 ft | May 15 | October 3 | 141 | Mount Jewett |
| Coatesville 2 W | 640 ft | April 19 | October 25 | 189 | Westwood |
| Confluence 1 Sw Dam | 1,490 ft | April 30 | October 18 | 171 | Confluence |
| Connellsville 2 Ssw | 900 ft | April 22 | October 27 | 188 | South Connellsville |
| Cooksburg 2 Nw | 1,450 ft | May 13 | October 7 | 147 | Marienville |
| Coudersport 1 Sw | 1,650 ft | May 22 | October 1 | 132 | Coudersport |
| Coudersport 7SE | 2,150 ft | May 14 | October 4 | 143 | Coudersport |
| Cowanesque Dam | 1,150 ft | May 9 | October 12 | 156 | Lawrenceville |
| Dehart Dam | 537 ft | May 1 | October 16 | 168 | Elizabethville |
| Donegal 2 Nw | 1,800 ft | April 30 | October 17 | 170 | Acme |
| Donora 1 Sw | 762 ft | April 27 | October 22 | 178 | Donora |
| Doylestown AP | 394 ft | April 13 | October 30 | 200 | Doylestown |
| Dubois Jefferson CO AP | 1,814 ft | May 6 | October 14 | 161 | Falls Creek |
| Dushore | 1,530 ft | May 14 | October 2 | 141 | Dushore |
| E Stroudsburg | 471 ft | May 1 | October 12 | 164 | East Stroudsburg |
| Ebensburg Sewage Plt | 1,940 ft | May 17 | October 2 | 138 | Ebensburg |
| Eisenhower Nhs | 540 ft | April 24 | October 21 | 180 | Gettysburg |
| Emporium | 1,040 ft | May 7 | October 15 | 161 | Emporium |
| Emsworth L/d Ohio Rvr | 717 ft | April 24 | October 27 | 186 | Ben Avon |
| Erie Intl AP | 730 ft | April 26 | November 4 | 192 | Fairview |
| Everett | 1,000 ft | April 27 | October 17 | 173 | Everett |
| Ford City 4 S Dam | 930 ft | May 4 | October 16 | 165 | Lenape Heights |
| Francis E Walter Dam | 1,509 ft | May 7 | October 6 | 152 | Pocono Mountain Lake Estates |
| Franklin | 1,015 ft | May 2 | October 23 | 174 | Franklin |
| Glen Hazel 2 Ne Dam | 1,720 ft | May 14 | October 6 | 145 | Johnsonburg |
| Glenmoore | 500 ft | April 11 | November 1 | 204 | Eagleview |
| Glenwillard Dashields L&d | 710 ft | April 8 | November 8 | 214 | Edgeworth |
| Grampian 1E | 1,510 ft | May 4 | October 13 | 162 | Curwensville |
| Graterford 1 E | 279 ft | April 24 | October 15 | 174 | Skippack |
| Grays Landing | 800 ft | April 28 | October 21 | 176 | Point Marion |
| Hamburg | 369 ft | April 16 | October 25 | 192 | Hamburg |
| Hanover 4 Sw | 558 ft | April 24 | October 20 | 179 | Pennville |
| Harrisburg 1 Ne | 420 ft | April 15 | October 23 | 191 | Harrisburg |
| Harrisburg Cptl Cy AP | 340 ft | April 9 | November 1 | 206 | New Market |
| Hawley 1 E | 890 ft | May 10 | October 4 | 147 | Hawley |
| Hidden Valley | 2,876 ft | May 2 | October 17 | 168 | Somerset |
| Hopewell Morgantown | 550 ft | April 16 | October 27 | 194 | Morgantown |
| Indiana 3 Se | 1,102 ft | May 8 | October 13 | 158 | Indiana |
| Jamestown 2 Nw | 1,040 ft | May 4 | October 14 | 163 | Jamestown |
| Johnstown Cambria CO AP | 2,284 ft | April 29 | October 21 | 175 | Geistown |
| Kane 1NNE | 1,750 ft | May 24 | September 28 | 127 | Kane |
| Lancaster 2NE Fltr Plt | 270 ft | April 19 | October 24 | 188 | Lancaster |
| Lancaster AP | 403 ft | April 18 | October 25 | 190 | Lititz |
| Landisville 2 Nw | 360 ft | April 30 | October 10 | 163 | Salunga |
| Laporte | 1,966 ft | May 6 | October 7 | 154 | Laporte |
| Laurel Mtn | 2,760 ft | April 26 | October 17 | 174 | Ligonier |
| Laurel Summit | 2,730 ft | May 6 | October 12 | 159 | Jennerstown |
| Laurelton Ctr | 800 ft | April 25 | October 19 | 177 | Mifflinburg |
| Lebanon 2 W | 450 ft | April 20 | October 25 | 188 | Cleona |
| Lehighton 1SSW | 455 ft | April 21 | October 23 | 185 | Weissport East |
| Lewisburg | 500 ft | April 26 | October 20 | 177 | Lewisburg |
| Lewistown | 460 ft | April 21 | October 24 | 186 | Juniata Terrace |
| Linesville 1 S | 1,030 ft | April 30 | October 23 | 176 | Linesville |
| Lock Haven Sewage Plt | 566 ft | April 30 | October 20 | 173 | Castanea |
| Loyalhanna Lake | 990 ft | May 2 | October 14 | 165 | Saltsburg |
| Mahanoy City 2 N | 1,710 ft | April 30 | October 22 | 175 | Mahanoy City |
| Marcus Hook | 10 ft | March 30 | November 16 | 231 | Linwood |
| Matamoras | 459 ft | May 2 | October 12 | 163 | |
| Mckeesport | 740 ft | May 2 | October 20 | 171 | Port Vue |
| Mercer | 1,220 ft | May 15 | October 3 | 141 | Mercer |
| Meyersdale 2 Ssw | 2,000 ft | May 12 | October 5 | 146 | Meyersdale |
| Middletown Harrisburg Intl AP | 312 ft | April 9 | November 2 | 207 | Middletown |
| Milanville | 760 ft | May 3 | October 9 | 159 | Masthope |
| Millheim | 1,120 ft | May 5 | October 6 | 154 | Millheim |
| Montgomery L&d | 690 ft | April 28 | October 26 | 181 | Industry |
| Montrose | 1,420 ft | May 14 | October 2 | 141 | Montrose |
| Moon Twp | 1,172 ft | April 28 | October 18 | 173 | Carnot-Moon |
| Mt Pleasant | 1,003 ft | May 1 | October 13 | 165 | Norvelt |
| Mt Pocono Mountains AP | 1,916 ft | May 6 | October 8 | 155 | Mount Pocono |
| Murrysville 2 Sw | 860 ft | April 22 | October 25 | 186 | Level Green |
| Natrona Lock 4 | 760 ft | April 16 | November 2 | 200 | Natrona Heights |
| Neshaminy Falls | 40 ft | April 21 | October 25 | 187 | Trevose |
| New Castle 1 N | 825 ft | April 30 | October 23 | 176 | New Castle Northwest |
| New Holland 2 Se | 605 ft | April 14 | November 1 | 201 | New Holland |
| Norristown | 62 ft | April 8 | October 31 | 206 | Bridgeport |
| Octoraro Lake | 260 ft | April 26 | October 22 | 179 | Oxford |
| Oswayo 1 Ene | 1,710 ft | May 20 | September 29 | 132 | |
| Phila Franklin Inst | 60 ft | March 30 | November 17 | 232 | Logan Square |
| Philadelphia Intl AP | 10 ft | April 2 | November 10 | 222 | Eastwick |
| Philadelphia Ne AP | 100 ft | April 4 | November 7 | 217 | Bustleton |
| Philipsburg 2 S | 1,720 ft | May 13 | October 1 | 141 | Chester Hill |
| Phoenixville 1 E | 85 ft | April 18 | October 27 | 192 | Phoenixville |
| Pittsburgh Allegheny CO AP | 1,248 ft | April 18 | October 28 | 193 | Dravosburg |
| Pittsburgh Intl AP | 1,203 ft | April 23 | October 23 | 183 | Enlow |
| Pleasant Mt 1 W | 1,800 ft | May 14 | October 1 | 140 | Forest City |
| Port Allegany | 1,475 ft | May 15 | October 6 | 144 | Port Allegany |
| Port Meadville AP | 1,400 ft | April 30 | October 23 | 176 | Fredericksburg |
| Pottstown Limerick AP | 291 ft | April 20 | October 23 | 186 | Limerick |
| Prince Gallitzin SP | 1,520 ft | May 10 | October 5 | 148 | Patton |
| Pt Marion Lock 8 | 810 ft | April 30 | October 23 | 176 | Point Marion |
| Putneyville 2 Se Dam | 1,280 ft | May 10 | October 12 | 155 | Dayton |
| Raystown Hq | 995 ft | April 19 | October 29 | 193 | McConnellstown |
| Raystown Lake 2 | 1,000 ft | April 19 | October 28 | 192 | McConnellstown |
| Reading 4 Nnw | 360 ft | April 10 | October 31 | 204 | Temple |
| Reading Spaatz Fld | 341 ft | April 14 | October 29 | 198 | Greenfields |
| Rector 3 Ssw | 1,330 ft | May 5 | October 6 | 154 | Ligonier |
| Renovo | 660 ft | April 30 | October 22 | 175 | Renovo |
| Ridgway | 1,360 ft | May 13 | October 11 | 151 | Ridgway |
| Rodale Rsch Ctr | 550 ft | April 26 | October 14 | 171 | Topton |
| S Mtn | 1,520 ft | April 27 | October 20 | 176 | Mont Alto |
| Safe Harbor Dam | 195 ft | April 1 | November 10 | 223 | Conestoga |
| Salina 3 W | 1,109 ft | April 29 | October 20 | 174 | Avonmore |
| Schenley Lock 5 | 783 ft | April 21 | October 30 | 192 | Freeport |
| Selinsgrove 2 S | 420 ft | April 25 | October 22 | 180 | Selinsgrove |
| Selinsgrove Penn Vly AP | 444 ft | April 27 | October 16 | 172 | Selinsgrove |
| Sellersville | 302 ft | April 26 | October 17 | 174 | Sellersville |
| Shawnee SP | 1,275 ft | May 4 | October 10 | 159 | Bedford |
| Shippensburg | 680 ft | April 19 | October 24 | 188 | Shippensburg |
| Slippery Rock 1 Ssw | 1,260 ft | May 7 | October 14 | 160 | Slippery Rock |
| Springboro 3 Wnw | 1,005 ft | May 8 | October 16 | 161 | Conneautville |
| Springtown 1 Nne | 860 ft | April 21 | October 22 | 184 | Hellertown |
| State College | 1,170 ft | April 20 | October 26 | 189 | State College |
| Stevenson Dam | 932 ft | May 10 | October 16 | 159 | Emporium |
| Sunbury | 575 ft | April 30 | October 13 | 166 | Sunbury |
| Tioga Hammond Dam | 1,230 ft | May 6 | October 10 | 157 | Tioga |
| Tionesta 2 Se Lake | 1,200 ft | May 1 | October 25 | 177 | Tionesta |
| Titusville Wtr Wks | 1,220 ft | May 12 | October 10 | 151 | Titusville |
| Towanda 1 S | 760 ft | May 2 | October 15 | 166 | Towanda |
| Union City Filtration Plant | 1,400 ft | May 7 | October 10 | 156 | Union City |
| Uniontown 1 Ne | 956 ft | April 30 | October 18 | 171 | Oliver |
| W Chester 2 Nw | 375 ft | April 26 | October 18 | 175 | West Chester |
| Warren | 1,210 ft | May 4 | October 21 | 170 | Warren |
| Washington 3 Ne | 1,300 ft | April 24 | October 23 | 182 | East Washington |
| Waynesburg 1 E | 940 ft | May 3 | October 15 | 165 | Morrisville |
| Wellsboro 4 Sw | 1,818 ft | May 10 | October 5 | 148 | Wellsboro |
| Wilkes-Barre Intl AP | 930 ft | April 23 | October 20 | 180 | Avoca |
| Williamsport | 520 ft | April 24 | October 23 | 182 | Montoursville |
| Williamsport 2 | 525 ft | April 25 | October 24 | 182 | Faxon |
| Willow Grove Nas | 361 ft | April 11 | November 1 | 204 | Horsham |
| Wolfsburg | 1,185 ft | April 29 | October 13 | 167 | Bedford |
| York 3 Ssw Pump Stn | 390 ft | April 26 | October 19 | 176 | Grantley |
| York AP | 486 ft | April 27 | October 18 | 174 | Spring Grove |
Sources
NOAA NCEI U.S. Climate Normals, 1991-2020, annual and seasonal freeze probabilities. Public domain.