When to plant in Bethel Park, PA
USDA Zone 6bBethel Park, Pennsylvania frost dates, USDA zone, and a full-year planting calendar, drawn from the nearest NOAA station and tuned to the local season.
In zone 6b, Bethel Park gardeners can grow many hardy perennials, while the last and first frost still dictate the annual vegetable calendar.
Frost probability
PITTSBURGH ALLEGHENY CO AP · 1991–2020The date the last spring and first fall frost occur, by threshold and probability. A 90% date is later in spring — and earlier in fall — than a 10% date; the 50% · 32°F row is what most gardeners plan around. These are Bethel Park’s own odds, recorded at PITTSBURGH ALLEGHENY CO AP.
| Threshold | SPRING 10% | SPRING 50% | SPRING 90% | FALL 10% | FALL 50% | FALL 90% |
|---|---|---|---|---|---|---|
| 36°F | May 17 | Apr 29 | Apr 16 | Oct 4 | Oct 17 | Oct 29 |
| 32°F | May 6 | Apr 18 | Apr 2 | Oct 14 | Oct 28 | Nov 10 |
| 28°F | Apr 21 | Apr 5 | Mar 23 | Oct 28 | Nov 8 | Nov 22 |
Download this table as CSV ↓ — every threshold and probability, plus this city’s planting-window dates.
What to plant now
TODAY · JULY 19Full-year planting calendar
Each bar is the exact window to take a planting action in Bethel Park, drawn to the day from the local frost dates. The dashed line is today.
Nearby weather stations
3 within 17 km · complete 32°F normalsWhen stations disagree by more than a few days, that spread is real microclimate variation — elevation, water, urban heat. Judge which station best matches your own yard.
Bethel Park planting FAQ
When is the last spring frost in Bethel Park, PA?
Bethel Park's average last spring frost falls near April 18 — the 50% mark at 32°F in the 1991–2020 normals. Hold tender transplants until the risk has passed, then plant out.
When is the first fall frost in Bethel Park, PA?
The first fall frost in Bethel Park typically arrives around October 28 (50% probability at 32°F). Harvest or protect frost-sensitive crops before then.
What hardiness zone is Bethel Park in?
Bethel Park is in USDA hardiness zone 6b. In zone 6b, winters are moderate — most common vegetables grow well in season.
How long is the growing season in Bethel Park?
Bethel Park has about 193 frost-free days — a moderate growing season — between the average last spring frost (April 18) and first fall frost (October 28).
When should I plant tomatoes in Bethel Park?
For Bethel Park, sow tomatoes indoors about February 21–March 7 and move the seedlings out around April 25, after the last spring frost.
Never miss a window in Bethel Park
An email when it’s time to start seeds, transplant, and sow — timed to Bethel Park’s frost dates. Double opt-in, one-click unsubscribe, no spam.
Nearby cities
8 within reach- Whitehall · 6 km
- Jefferson Hills · 8 km
- Baldwin · 10 km
- West Mifflin · 12 km
- Munhall · 14 km
- Pittsburgh · 14 km
- McKeesport · 16 km
- Wilkinsburg · 19 km
Frost dates recorded at PITTSBURGH ALLEGHENY CO AP, 10 km from the city center · 1991–2020 NOAA climate normals · zone from the USDA/PRISM 2023 map. How we compute this.
BlissGarden. "When to Plant in Bethel Park, PA — Frost Dates & Zone 6b." Frost normals: NOAA NCEI U.S. Climate Normals 1991–2020, station USW00014762. Retrieved from https://blissgarden.com/pennsylvania/bethel-park.