Glen Osborne, PA Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Glen Osborne, a borough in Allegheny County, Pennsylvania.
This Afternoon
76°F
Mostly Sunny
Mostly sunny, with a high near 76. North wind around 7 mph.
7-day forecast for Glen Osborne
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 76°F | Mostly Sunny | 7 mph N | 10% |
| Tonight | 58°F | Partly Cloudy | 2 to 7 mph NE | 10% |
| Saturday | 78°F | Partly Sunny | 5 mph E | 7% |
| Saturday Night | 65°F | Mostly Cloudy then Showers And Thunderstorms Likely | 5 mph SE | 62% |
| Sunday | 77°F | Showers And Thunderstorms | 7 mph SW | 95% |
| Sunday Night | 59°F | Showers And Thunderstorms | 8 mph N | 95% |
| Monday | 68°F | Chance Rain Showers | 9 mph NE | 37% |
| Monday Night | 58°F | Showers And Thunderstorms Likely | 12 mph E | 58% |
| Tuesday | 65°F | Showers And Thunderstorms Likely | 12 mph E | 67% |
| Tuesday Night | 55°F | Showers And Thunderstorms Likely | 14 mph E | 67% |
| Wednesday | 63°F | Showers And Thunderstorms Likely | 13 mph E | 65% |
| Wednesday Night | 54°F | Chance Showers And Thunderstorms | 8 to 13 mph E | 51% |
| Thursday | 64°F | Chance Rain Showers | 9 mph E | 41% |
| Thursday Night | 53°F | Slight Chance Rain Showers | 3 to 7 mph NE | 18% |
Forecast source: National Weather Service (api.weather.gov) for Glen Osborne (40.530, -80.167). Updated through the day.
Growing snapshot for Glen Osborne
Last spring frost
Apr 8
First fall frost
Nov 8
Growing season
212 days
Hardiness zone
6b
More local growing data for Glen Osborne: nearby ZIP 15143 weather · frost dates · planting calendar · Pennsylvania frost dates
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Climate data from the nearest NOAA station, Glenwillard Dashields L&D, Pa (3.4 mi from Glen Osborne). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 18, 2026.