Glenfield, PA Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Glenfield, a borough in Allegheny County, Pennsylvania.
Overnight
54°F
Mostly Clear
Mostly clear, with a low around 54. Southeast wind around 5 mph.
7-day forecast for Glenfield
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 54°F | Mostly Clear | 5 mph SE | 1% |
| Wednesday | 76°F | Mostly Cloudy then Chance Light Rain | 5 to 9 mph SE | 31% |
| Wednesday Night | 60°F | Light Rain | 8 to 14 mph S | 94% |
| Thursday | 68°F | Mostly Sunny | 6 to 12 mph SW | 11% |
| Thursday Night | 48°F | Partly Cloudy | 2 to 6 mph SW | 1% |
| Friday | 62°F | Partly Sunny then Slight Chance Light Rain | 2 to 7 mph SW | 18% |
| Friday Night | 43°F | Chance Light Rain | 5 to 8 mph W | 34% |
| Saturday | 55°F | Chance Light Rain | 6 to 9 mph W | 29% |
| Saturday Night | 38°F | Chance Light Rain then Mostly Cloudy | 2 to 7 mph W | 27% |
| Sunday | 55°F | Partly Sunny then Slight Chance Light Rain | 3 to 9 mph W | 16% |
| Sunday Night | 37°F | Slight Chance Light Rain | 8 mph W | 18% |
| Monday | 56°F | Chance Light Rain | 8 to 13 mph W | 26% |
| Monday Night | 38°F | Chance Light Rain then Partly Cloudy | 10 mph SW | 26% |
| Tuesday | 59°F | Mostly Sunny | 12 to 15 mph W | 9% |
Forecast source: National Weather Service (api.weather.gov) for Glenfield (40.522, -80.141). Updated through the day.
Growing snapshot for Glenfield
Last spring frost
Apr 24
First fall frost
Oct 27
Growing season
186 days
Hardiness zone
7a
More local growing data for Glenfield: nearby ZIP 15225 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 (1.3 mi from Glenfield). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 4, 2026.