Wilkes-Barre, PA Frost Dates
Average frost dates, USDA hardiness zone, and growing season length for Wilkes-Barre, Pennsylvania.
Gardening in Wilkes-Barre
The Wyoming Valley's anthracite heritage created tough, resilient communities — and that resilience shows up in gardens that produce despite rocky, challenging soil.
Zone 5b with 163 frost-free days. The Susquehanna River valley provides fertile bottomland. Northeastern Pennsylvania's climate is colder than Philadelphia by a meaningful margin.
The Wyoming Valley's coal-country heritage created communities that know how to work hard for results. That work ethic extends to the garden.
What This Means for Wilkes-Barre Gardeners
The average last spring frost in Wilkes-Barre is around April 28, and the average first fall frost arrives around October 8. That gives you approximately 163 frost-free days to work with.
At 163 days, you're working with a compressed but productive window. Choose varieties by their days-to-maturity number — anything under 75 days is safe, 75-90 requires indoor starting, and 90+ is a calculated risk. The tradeoff: your cool, moderate summers are excellent for crops that heat-zone gardeners struggle with. Your lettuce doesn't bolt in June. Your peas produce for weeks longer. Cool-season crops are your superpower.
These dates are based on NOAA 30-year Climate Normal data for the Wilkes-Barre area. Your actual frost dates could shift 2-3 weeks in either direction in any given year. Learn more about our data sources.
What to Grow in Wilkes-Barre
Wilkes-Barre's 163-day season gives you plenty of time for most vegetables with good planning. Start warm-season crops indoors to maximize your window. Cool-season crops thrive in your spring and fall shoulder seasons. Recommended starting points: tomatoes, peppers, lettuce, carrots, beans, broccoli, garlic, and basil.
See the full Pennsylvania planting guide for all 40 plants: Pennsylvania Planting Calendar. Or enter your zip code for exact planting dates personalized to Wilkes-Barre.
More About Zone 5B
Wilkes-Barre is in USDA Hardiness Zone 5B, which means average annual extreme minimum temperatures between -15°F to -10°F. View the full Zone 5B planting guide.
See the complete planting calendar for Pennsylvania: Pennsylvania Planting Calendar.
Other Cities in Pennsylvania
Frequently Asked Questions
These dates are based on NOAA's 30-year Climate Normal data for the Wilkes-Barre area. They represent historical averages, not predictions. In any given year, the actual last frost could be 2-3 weeks earlier or later. Microclimates within Wilkes-Barre (urban heat islands, hilltops, low-lying valleys) can also shift your local frost dates by a week or more.
Start warm-season seeds indoors 6-8 weeks before your last frost (April 28) to maximize your 163-day window. Direct sow cold-hardy crops like peas and lettuce 3-4 weeks before last frost. Every week of early indoor starting matters at this season length. Enter your zip code for exact dates.