Frost dates in Pennsylvania
Average last frost dates in Pennsylvania run from March 30 in Chester to May 15 in Hermitage.
| Place | Last frost | First frost |
|---|---|---|
| Allentown | Apr 20 | Oct 24 |
| Altoona | Apr 25 | Oct 21 |
| Baldwin | Apr 18 | Oct 28 |
| Berwick | May 4 | Oct 11 |
| Bethel Park | Apr 18 | Oct 28 |
| Bethlehem | Apr 20 | Oct 24 |
| Bloomsburg | Apr 27 | Oct 20 |
| Butler | May 7 | Oct 14 |
| Carlisle | Apr 23 | Oct 18 |
| Chambersburg | Apr 18 | Oct 25 |
| Chester | Mar 30 | Nov 16 |
| Coatesville | Apr 19 | Oct 25 |
| Columbia | Apr 30 | Oct 10 |
| Darby | Apr 2 | Nov 10 |
| Dunmore | Apr 23 | Oct 20 |
| Easton | Apr 18 | Oct 25 |
| Elizabethtown | Apr 9 | Nov 2 |
| Emmaus | Apr 20 | Oct 24 |
| Ephrata | Apr 18 | Oct 25 |
| Erie | Apr 26 | Nov 4 |
| Franklin Park | Apr 24 | Oct 27 |
| Greensburg | May 1 | Oct 13 |
| Hanover | Apr 24 | Oct 20 |
| Harrisburg | Apr 15 | Oct 23 |
| Hazleton | Apr 30 | Oct 22 |
| Hermitage | May 15 | Oct 3 |
| Indiana | May 8 | Oct 13 |
| Jefferson Hills | Apr 18 | Oct 28 |
| Johnstown | Apr 29 | Oct 21 |
| Kingston | Apr 23 | Oct 20 |
| Lancaster | Apr 19 | Oct 24 |
| Lansdale | Apr 11 | Nov 1 |
| Lansdowne | Apr 2 | Nov 10 |
| Lebanon | Apr 20 | Oct 25 |
| Lower Burrell | Apr 16 | Nov 2 |
| McKeesport | May 2 | Oct 20 |
| Meadville | Apr 30 | Oct 23 |
| Mechanicsburg | Apr 9 | Nov 1 |
| Monroeville | Apr 22 | Oct 25 |
| Munhall | Apr 5 | Nov 10 |
| Murrysville | Apr 22 | Oct 25 |
| Nanticoke | May 7 | Oct 6 |
| New Castle | Apr 30 | Oct 23 |
| New Kensington | Apr 16 | Nov 2 |
| Norristown | Apr 8 | Oct 31 |
| Northampton | Apr 20 | Oct 24 |
| Philadelphia | Mar 30 | Nov 17 |
| Phoenixville | Apr 18 | Oct 27 |
| Pittsburgh | Apr 18 | Oct 28 |
| Plum | Apr 16 | Nov 1 |
| Pottstown | Apr 20 | Oct 23 |
| Pottsville | Apr 30 | Oct 22 |
| Reading | Apr 14 | Oct 29 |
| Scranton | Apr 23 | Oct 20 |
| Sharon | May 1 | Oct 17 |
| St. Marys | May 14 | Oct 6 |
| State College | Apr 20 | Oct 26 |
| Washington | Apr 24 | Oct 23 |
| Waynesboro | Apr 25 | Oct 19 |
| West Chester | Apr 26 | Oct 18 |
| West Mifflin | Apr 18 | Oct 28 |
| Whitehall | Apr 18 | Oct 28 |
| Wilkes-Barre | Apr 23 | Oct 20 |
| Wilkinsburg | Apr 5 | Nov 10 |
| Williamsport | Apr 25 | Oct 24 |
| Wyomissing | Apr 14 | Oct 29 |
| Yeadon | Apr 2 | Nov 10 |
| York | Apr 26 | Oct 19 |
Source: NOAA U.S. Climate Normals 1991–2020, nearest station to each place. Places of 10,000+ people (US Census Bureau, 2024 estimates) within 50 miles of a station.
When to plant in Pennsylvania
- Asparagus
- Lima Beans
- Green Beans
- Beets
- Broccoli
- Brussels Sprouts
- Cabbage
- Chinese Cabbage
- Carrots
- Cauliflower
- Celery
- Swiss Chard
- Collard Greens
- Sweet Corn
- Cucumbers
- Eggplant
- Garlic
- Kale
- Leeks
- Lettuce
- Cantaloupe
- Okra
- Onions
- Onion Sets
- Peas
- Black-Eyed Peas
- Peppers
- Potatoes
- Radishes
- Rhubarb
- Spinach
- Summer Squash (Zucchini)
- Winter Squash
- Sweet Potatoes
- Tomatoes
- Turnips
- Watermelon