Glenshaw, PA Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Glenshaw, a community in Allegheny County, Pennsylvania.
Today
86°F
Sunny
Sunny, with a high near 86. East wind around 5 mph.
7-day forecast for Glenshaw
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 86°F | Sunny | 5 mph E | 0% |
| Tonight | 67°F | Mostly Clear | 2 to 6 mph E | 1% |
| Wednesday | 87°F | Mostly Sunny then Scattered Showers And Thunderstorms | 2 to 6 mph SE | 30% |
| Wednesday Night | 68°F | Scattered Showers And Thunderstorms | 2 to 6 mph S | 50% |
| Thursday | 86°F | Showers And Thunderstorms Likely | 3 to 8 mph SW | 70% |
| Thursday Night | 68°F | Showers And Thunderstorms Likely | 2 to 7 mph SW | 70% |
| Friday | 84°F | Showers And Thunderstorms | 3 to 8 mph SW | 82% |
| Friday Night | 67°F | Showers And Thunderstorms | 3 to 7 mph SW | 82% |
| Saturday | 84°F | Chance Showers And Thunderstorms | 5 to 9 mph SW | 50% |
| Saturday Night | 67°F | Chance Showers And Thunderstorms | 3 to 8 mph SW | 50% |
| Sunday | 86°F | Slight Chance Showers And Thunderstorms | 5 to 10 mph SW | 20% |
| Sunday Night | 69°F | Slight Chance Showers And Thunderstorms | 6 to 9 mph SW | 22% |
| Monday | 87°F | Chance Rain Showers | 8 to 13 mph SW | 37% |
| Monday Night | 68°F | Chance Showers And Thunderstorms | 7 to 10 mph SW | 48% |
Forecast source: National Weather Service (api.weather.gov) for Glenshaw (40.539, -79.973). Updated through the day.
Growing snapshot for Glenshaw
Last spring frost
Apr 24
First fall frost
Oct 27
Growing season
186 days
Hardiness zone
6b
More local growing data for Glenshaw: nearby ZIP 15209 weather · frost dates · planting calendar · Pennsylvania frost dates
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Climate data from the nearest NOAA station, Emsworth L/D Ohio Rvr, Pa (6.3 mi from Glenshaw). Frost dates are 1991–2020 averages, not a forecast. Page updated Aug 4, 2026.