Pennsylvania frost dates: L
| City | Last frost | First frost | Season | Zone |
|---|---|---|---|---|
| La Belle | Apr 13 | Nov 5 | 206 d | 6b |
| La Jose | May 10 | Oct 5 | 148 d | 6a |
| La Plume | Apr 23 | Oct 20 | 180 d | 6a |
| Laceyville | May 2 | Oct 15 | 166 d | 6a |
| Lackawaxen | May 10 | Oct 4 | 147 d | 6a |
| Lafayette Hill | Apr 8 | Oct 31 | 206 d | 7b |
| Lahaska | Apr 13 | Oct 30 | 200 d | 7a |
| Lairdsville | May 4 | Oct 11 | 160 d | 6b |
| Lake Ariel | May 10 | Oct 4 | 147 d | 6a |
| Lake City | Apr 26 | Nov 4 | 192 d | 7a |
| Lake Como | May 14 | Oct 1 | 140 d | 5b |
| Lake Harmony | May 7 | Oct 6 | 152 d | 6a |
| Lake Lynn | Apr 25 | Oct 24 | 182 d | 6b |
| Lake Winola | Apr 23 | Oct 20 | 180 d | 6a |
| Lakeville | May 10 | Oct 4 | 147 d | 6a |
| Lakewood | May 14 | Oct 1 | 140 d | 5b |
| Lamar | Apr 30 | Oct 20 | 173 d | 6b |
| Lamartine | May 9 | Oct 11 | 155 d | 6a |
| Lampeter | Apr 19 | Oct 24 | 188 d | 7a |
| Lancaster | Apr 19 | Oct 24 | 188 d | 7a |
| Landenberg | Apr 19 | Oct 26 | 190 d | 7a |
| Landisburg | Apr 18 | Oct 26 | 191 d | 7a |
| Landisville | Apr 30 | Oct 10 | 163 d | 7a |
| Lanesboro | May 12 | Oct 9 | 150 d | 6a |
| Langeloth | Apr 29 | Oct 20 | 174 d | 6b |
| Langhorne | Apr 21 | Oct 25 | 187 d | 7a |
| Lansdale | Apr 24 | Oct 15 | 174 d | 7a |
| Lansdowne | Mar 30 | Nov 17 | 232 d | 7b |
| Lanse | May 13 | Oct 1 | 141 d | 6a |
| Lansford | Apr 21 | Oct 23 | 185 d | 6b |
| Laporte | May 6 | Oct 7 | 154 d | 6a |
| Larimer | Apr 22 | Oct 25 | 186 d | 6b |
| Latrobe | May 1 | Oct 13 | 165 d | 6b |
| Lattimer Mines | Apr 30 | Oct 22 | 175 d | 6b |
| Laughlintown | Apr 26 | Oct 17 | 174 d | 6a |
| Laurelton | Apr 25 | Oct 19 | 177 d | 6b |
| Laurys Station | Apr 20 | Oct 24 | 187 d | 7a |
| Lavelle | Apr 27 | Oct 20 | 176 d | 6b |
| Lawn | Apr 20 | Oct 25 | 188 d | 7a |
| Lawrence | Apr 24 | Oct 23 | 182 d | 6b |
| Lawrenceville | May 9 | Oct 12 | 156 d | 6a |
| Lawton | May 14 | Oct 2 | 141 d | 6a |
| Le Raysville | May 2 | Oct 15 | 166 d | 6a |
| Lebanon | Apr 20 | Oct 25 | 188 d | 7a |
| Leck Kill | Apr 27 | Oct 20 | 176 d | 6b |
| Leckrone | Apr 28 | Oct 21 | 176 d | 6b |
| Lecontes Mills | May 4 | Oct 11 | 160 d | 6a |
| Lederach | Apr 24 | Oct 15 | 174 d | 7a |
| Leechburg | Apr 21 | Oct 30 | 192 d | 6b |
| Leeper | May 13 | Oct 7 | 147 d | 6a |
| Leesport | Apr 26 | Oct 19 | 176 d | 7a |
| Leetsdale | Apr 8 | Nov 8 | 214 d | 7a |
| Lehigh Valley | Apr 20 | Oct 24 | 187 d | 7a |
| Lehighton | Apr 21 | Oct 23 | 185 d | 6b |
| Lehman | Apr 23 | Oct 20 | 180 d | 6a |
| Leisenring | Apr 22 | Oct 27 | 188 d | 6b |
| Lemasters | Apr 7 | Nov 4 | 211 d | 7a |
| Lemont | Apr 20 | Oct 26 | 189 d | 6b |
| Lemont Furnace | Apr 30 | Oct 18 | 171 d | 6b |
| Lemoyne | Apr 15 | Oct 23 | 191 d | 7a |
| Lenhartsville | Apr 16 | Oct 25 | 192 d | 6b |
| Lenni | Mar 30 | Nov 16 | 231 d | 7b |
| Lenoxville | May 14 | Oct 1 | 140 d | 6a |
| Leola | Apr 19 | Oct 24 | 188 d | 7a |
| Levittown | Apr 21 | Oct 25 | 187 d | 7a |
| Lewis Run | May 18 | Oct 1 | 136 d | 5b |
| Lewisberry | Apr 9 | Nov 1 | 206 d | 7a |
| Lewisburg | Apr 26 | Oct 20 | 177 d | 6b |
| Lewistown | Apr 21 | Oct 24 | 186 d | 7a |
| Lewisville | Apr 7 | Nov 2 | 209 d | 7a |
| Liberty | May 16 | Oct 2 | 139 d | 6a |
| Lickingville | May 1 | Oct 25 | 177 d | 6a |
| Ligonier | Apr 26 | Oct 17 | 174 d | 6a |
| Lilly | May 17 | Oct 2 | 138 d | 6a |
| Limekiln | Apr 14 | Oct 29 | 198 d | 7a |
| Limeport | Apr 20 | Oct 24 | 187 d | 7a |
| Limestone | May 9 | Oct 11 | 155 d | 6a |
| Lincoln University | Apr 19 | Oct 26 | 190 d | 7a |
| Linden | Apr 25 | Oct 24 | 182 d | 6b |
| Line Lexington | Apr 26 | Oct 17 | 174 d | 7a |
| Linesville | Apr 30 | Oct 23 | 176 d | 6a |
| Lionville | Apr 18 | Oct 27 | 192 d | 7a |
| Listie | May 6 | Oct 12 | 159 d | 6a |
| Lititz | Apr 18 | Oct 25 | 190 d | 7a |
| Little Meadows | May 5 | Oct 12 | 160 d | 6a |
| Littlestown | Apr 24 | Oct 20 | 179 d | 7a |
| Liverpool | May 1 | Oct 16 | 168 d | 6b |
| Llewellyn | Apr 30 | Oct 22 | 175 d | 6b |
| Lock Haven | Apr 30 | Oct 20 | 173 d | 6a |
| Locust Gap | Apr 27 | Oct 20 | 176 d | 6b |
| Locustdale | Apr 27 | Oct 20 | 176 d | 6b |
| Loganton | Apr 30 | Oct 20 | 173 d | 6b |
| Loganville | Apr 26 | Oct 19 | 176 d | 7a |
| Long Pond | May 6 | Oct 8 | 155 d | 6a |
| Lopez | May 14 | Oct 2 | 141 d | 6a |
| Loretto | May 17 | Oct 2 | 138 d | 6a |
| Lost Creek | Apr 30 | Oct 22 | 175 d | 6b |
| Lowber | Apr 27 | Oct 22 | 178 d | 6b |
| Loyalhanna | May 1 | Oct 13 | 165 d | 6b |
| Loysburg | Apr 23 | Oct 21 | 181 d | 6b |
| Loysville | Apr 18 | Oct 26 | 191 d | 7a |
| Lucernemines | May 8 | Oct 13 | 158 d | 6b |
| Lucinda | May 13 | Oct 7 | 147 d | 6a |
| Ludlow | May 24 | Sep 28 | 127 d | 5b |
| Lumberville | Apr 13 | Oct 30 | 200 d | 7a |
| Lurgan | Apr 19 | Oct 24 | 188 d | 7a |
| Luthersburg | May 4 | Oct 13 | 162 d | 6a |
| Luxor | May 1 | Oct 13 | 165 d | 6b |
| Luzerne | Apr 23 | Oct 20 | 180 d | 6b |
| Lykens | May 1 | Oct 16 | 168 d | 6b |
| Lyndell | Apr 11 | Nov 1 | 204 d | 7a |
| Lyndora | May 7 | Oct 14 | 160 d | 6b |
| Lyon Station | Apr 26 | Oct 14 | 171 d | 7a |