Pitcairn, PA Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Pitcairn, a borough in Allegheny County, Pennsylvania.
Today
86°F
Sunny
Sunny, with a high near 86. East wind around 5 mph.
7-day forecast for Pitcairn
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 86°F | Sunny | 5 mph E | 0% |
| Tonight | 66°F | Mostly Clear | 6 mph E | 1% |
| Wednesday | 86°F | Partly Sunny then Isolated Showers And Thunderstorms | 2 to 6 mph SE | 21% |
| Wednesday Night | 68°F | Scattered Showers And Thunderstorms | 6 mph S | 50% |
| Thursday | 86°F | Showers And Thunderstorms Likely | 3 to 9 mph SW | 73% |
| Thursday Night | 68°F | Showers And Thunderstorms Likely | 3 to 7 mph SW | 73% |
| Friday | 84°F | Showers And Thunderstorms | 5 to 9 mph SW | 82% |
| Friday Night | 67°F | Showers And Thunderstorms | 3 to 7 mph SW | 82% |
| Saturday | 84°F | Showers And Thunderstorms Likely | 6 to 9 mph SW | 56% |
| Saturday Night | 66°F | Showers And Thunderstorms Likely | 5 to 9 mph SW | 56% |
| Sunday | 86°F | Slight Chance Showers And Thunderstorms | 5 to 12 mph SW | 23% |
| Sunday Night | 69°F | Slight Chance Showers And Thunderstorms | 7 to 10 mph SW | 23% |
| Monday | 87°F | Chance Showers And Thunderstorms | 9 to 14 mph SW | 40% |
| Monday Night | 68°F | Chance Showers And Thunderstorms | 7 to 12 mph SW | 50% |
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 Aug 4, 2026.