When to plant in Whitehall, PA
USDA Zone 6bWhitehall, 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, Whitehall 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 Whitehall’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 Whitehall, drawn to the day from the local frost dates. The dashed line is today.
Nearby weather stations
3 within 12 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.
Whitehall planting FAQ
When is the last spring frost in Whitehall, PA?
Plan for the last spring frost in Whitehall around April 18 (the date it has a 50% chance of a 32°F freeze). Anything frost-sensitive should go out after it.
When is the first fall frost in Whitehall, PA?
In Whitehall, the first 32°F freeze of fall lands around October 28 on average. Time your last harvests and any season-extension cover before it.
What hardiness zone is Whitehall in?
Whitehall 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 Whitehall?
Whitehall 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 Whitehall?
For Whitehall, 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 Whitehall
An email when it’s time to start seeds, transplant, and sow — timed to Whitehall’s frost dates. Double opt-in, one-click unsubscribe, no spam.
Nearby cities
8 within reach- Baldwin · 4 km
- Bethel Park · 6 km
- West Mifflin · 7 km
- Jefferson Hills · 8 km
- Munhall · 8 km
- Pittsburgh · 9 km
- McKeesport · 12 km
- Wilkinsburg · 14 km
Frost dates recorded at PITTSBURGH ALLEGHENY CO AP, 6 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 Whitehall, PA — Frost Dates & Zone 6b." Frost normals: NOAA NCEI U.S. Climate Normals 1991–2020, station USW00014762. Retrieved from https://blissgarden.com/pennsylvania/whitehall.