Pitcairn, PA Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Pitcairn, a borough in Allegheny County, Pennsylvania.
Tonight
52°F
Mostly Clear
Mostly clear, with a low around 52. Southeast wind around 6 mph.
7-day forecast for Pitcairn
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 52°F | Mostly Clear | 6 mph SE | 2% |
| Wednesday | 78°F | Partly Sunny | 3 to 10 mph S | 7% |
| Wednesday Night | 60°F | Light Rain | 12 mph S | 97% |
| Thursday | 70°F | Chance Light Rain | 8 to 15 mph SW | 41% |
| Thursday Night | 49°F | Partly Cloudy | 2 to 7 mph SW | 5% |
| Friday | 65°F | Partly Sunny | 2 to 8 mph W | 11% |
| Friday Night | 44°F | Chance Light Rain | 3 to 7 mph NW | 27% |
| Saturday | 56°F | Chance Light Rain | 7 to 14 mph W | 30% |
| Saturday Night | 37°F | Slight Chance Light Rain then Mostly Cloudy | 5 to 10 mph W | 24% |
| Sunday | 56°F | Partly Sunny then Slight Chance Light Rain | 5 to 13 mph SW | 17% |
| Sunday Night | 36°F | Slight Chance Light Rain | 12 mph W | 20% |
| Monday | 56°F | Chance Light Rain | 12 to 18 mph W | 31% |
| Monday Night | 37°F | Chance Light Rain then Partly Cloudy | 10 to 14 mph SW | 31% |
| Tuesday | 60°F | Mostly Sunny | 15 to 21 mph SW | 10% |
Forecast source: National Weather Service (api.weather.gov) for Pitcairn (40.408, -79.776). Updated through the day.
Growing snapshot for Pitcairn
Last spring frost
Apr 22
First fall frost
Oct 25
Growing season
186 days
Hardiness zone
6b
More local growing data for Pitcairn: nearby ZIP 15140 weather · frost dates · planting calendar · Pennsylvania frost dates
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Climate data from the nearest NOAA station, Murrysville 2 Sw, Pa (2.9 mi from Pitcairn). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 4, 2026.