Glenshaw, PA Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Glenshaw, a community in Allegheny County, Pennsylvania.
Today
78°F
Partly Sunny
Partly sunny, with a high near 78. East wind around 6 mph.
7-day forecast for Glenshaw
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 78°F | Partly Sunny | 6 mph E | 4% |
| Tonight | 64°F | Showers And Thunderstorms Likely | 7 mph SE | 69% |
| Sunday | 77°F | Showers And Thunderstorms | 7 to 10 mph SW | 96% |
| Sunday Night | 54°F | Showers And Thunderstorms | 10 mph N | 96% |
| Monday | 67°F | Chance Rain Showers | 13 mph NE | 36% |
| Monday Night | 53°F | Rain Showers Likely | 14 mph E | 60% |
| Tuesday | 62°F | Rain Showers Likely | 16 mph E | 60% |
| Tuesday Night | 51°F | Rain Showers Likely | 16 mph E | 62% |
| Wednesday | 61°F | Rain Showers Likely | 16 mph E | 62% |
| Wednesday Night | 51°F | Showers And Thunderstorms Likely | 10 to 14 mph E | 61% |
| Thursday | 65°F | Rain Showers Likely | 12 mph E | 59% |
| Thursday Night | 50°F | Chance Rain Showers | 6 to 10 mph NE | 26% |
| Friday | 68°F | Slight Chance Rain Showers | 9 mph NE | 17% |
| Friday Night | 49°F | Slight Chance Rain Showers then Partly Cloudy | 6 to 9 mph NE | 17% |
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 Sep 19, 2026.