Glenshaw, PA Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Glenshaw, a community in Allegheny County, Pennsylvania.
Overnight
53°F
Mostly Clear
Mostly clear, with a low around 53. Southeast wind around 1 mph.
7-day forecast for Glenshaw
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 53°F | Mostly Clear | 1 mph SE | 1% |
| Wednesday | 77°F | Mostly Cloudy then Slight Chance Light Rain | 1 to 10 mph S | 17% |
| Wednesday Night | 60°F | Light Rain | 12 mph S | 92% |
| Thursday | 68°F | Slight Chance Light Rain then Mostly Sunny | 7 to 14 mph SW | 24% |
| Thursday Night | 47°F | Partly Cloudy | 2 to 6 mph SW | 1% |
| Friday | 62°F | Partly Sunny then Slight Chance Light Rain | 2 to 9 mph SW | 18% |
| Friday Night | 41°F | Chance Light Rain | 5 to 9 mph W | 34% |
| Saturday | 52°F | Chance Light Rain | 9 to 13 mph W | 31% |
| Saturday Night | 36°F | Chance Light Rain | 7 to 10 mph W | 25% |
| Sunday | 54°F | Partly Sunny | 7 to 14 mph W | 7% |
| Sunday Night | 34°F | Partly Cloudy | 10 mph W | 5% |
| Monday | 55°F | Mostly Sunny | 8 to 14 mph W | 12% |
| Monday Night | 35°F | Mostly Clear | 6 to 9 mph SW | 10% |
| Tuesday | 59°F | Mostly Sunny | 10 to 15 mph SW | 3% |
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 Nov 4, 2026.