Forest Hills, PA Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Forest Hills, a borough in Allegheny County, Pennsylvania.
Overnight
57°F
Mostly Clear
Mostly clear, with a low around 57. Northeast wind around 2 mph.
7-day forecast for Forest Hills
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 57°F | Mostly Clear | 2 mph NE | 0% |
| Tuesday | 86°F | Sunny | 5 mph E | 0% |
| Tuesday Night | 67°F | Partly Cloudy | 2 to 6 mph E | 1% |
| Wednesday | 87°F | Partly Sunny then Isolated Showers And Thunderstorms | 2 to 6 mph SE | 21% |
| Wednesday Night | 68°F | Scattered Showers And Thunderstorms | 6 mph S | 50% |
| Thursday | 86°F | Showers And Thunderstorms Likely | 3 to 9 mph SW | 73% |
| Thursday Night | 68°F | Showers And Thunderstorms Likely | 3 to 8 mph SW | 73% |
| Friday | 85°F | Showers And Thunderstorms | 5 to 9 mph SW | 82% |
| Friday Night | 67°F | Showers And Thunderstorms | 3 to 7 mph SW | 82% |
| Saturday | 84°F | Showers And Thunderstorms Likely | 6 to 9 mph SW | 55% |
| Saturday Night | 67°F | Showers And Thunderstorms Likely | 5 to 8 mph SW | 55% |
| Sunday | 87°F | Slight Chance Showers And Thunderstorms | 5 to 12 mph SW | 22% |
| Sunday Night | 69°F | Slight Chance Showers And Thunderstorms | 7 to 10 mph SW | 23% |
| Monday | 88°F | Chance Showers And Thunderstorms | 9 to 14 mph SW | 38% |
Forecast source: National Weather Service (api.weather.gov) for Forest Hills (40.425, -79.854). Updated through the day.
Growing snapshot for Forest Hills
Last spring frost
Apr 5
First fall frost
Nov 10
Growing season
219 days
Hardiness zone
6b
More local growing data for Forest Hills: nearby ZIP 15221 weather · frost dates · planting calendar · Pennsylvania frost dates
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Climate data from the nearest NOAA station, Braddock Lock 2, Pa (3 mi from Forest Hills). Frost dates are 1991–2020 averages, not a forecast. Page updated Aug 4, 2026.