Jefferson Hills, PA Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Jefferson Hills, a borough in Allegheny County, Pennsylvania.
Today
86°F
Patchy Fog then Sunny
Patchy fog before 9am. Sunny, with a high near 86. East wind around 5 mph.
7-day forecast for Jefferson Hills
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 86°F | Patchy Fog then Sunny | 5 mph E | 0% |
| Tonight | 67°F | Partly Cloudy | 2 to 6 mph SE | 1% |
| Wednesday | 87°F | Mostly Sunny then Isolated Showers And Thunderstorms | 2 to 6 mph S | 22% |
| Wednesday Night | 68°F | Scattered Showers And Thunderstorms | 2 to 6 mph S | 50% |
| Thursday | 85°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 | 84°F | Showers And Thunderstorms | 5 to 9 mph SW | 83% |
| Friday Night | 67°F | Showers And Thunderstorms | 3 to 8 mph SW | 83% |
| Saturday | 83°F | Showers And Thunderstorms Likely | 6 to 9 mph SW | 57% |
| Saturday Night | 67°F | Showers And Thunderstorms Likely | 5 to 8 mph SW | 57% |
| Sunday | 86°F | Slight Chance Showers And Thunderstorms | 5 to 10 mph SW | 22% |
| Sunday Night | 69°F | Slight Chance Showers And Thunderstorms | 9 mph SW | 23% |
| Monday | 86°F | Chance Showers And Thunderstorms | 8 to 13 mph SW | 36% |
| Monday Night | 68°F | Chance Showers And Thunderstorms | 7 to 10 mph SW | 49% |
Forecast source: National Weather Service (api.weather.gov) for Jefferson Hills (40.297, -79.942). Updated through the day.
Growing snapshot for Jefferson Hills
Last spring frost
Apr 18
First fall frost
Oct 28
Growing season
193 days
Hardiness zone
6b
More local growing data for Jefferson Hills: nearby ZIP 15025 weather · frost dates · planting calendar · Pennsylvania frost dates
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Climate data from the nearest NOAA station, Pittsburgh Allegheny Co Ap, Pa (4 mi from Jefferson Hills). Frost dates are 1991–2020 averages, not a forecast. Page updated Aug 4, 2026.