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
78°F
Partly Sunny then Slight Chance Light Rain
A slight chance of rain after 5pm. Partly sunny, with a high near 78. South wind 0 to 12 mph. Chance of precipitation is 20%.
7-day forecast for Jefferson Hills
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 78°F | Partly Sunny then Slight Chance Light Rain | 0 to 12 mph S | 16% |
| Tonight | 61°F | Light Rain | 12 mph S | 95% |
| Thursday | 70°F | Chance Light Rain then Mostly Sunny | 8 to 15 mph SW | 39% |
| Thursday Night | 48°F | Partly Cloudy | 2 to 7 mph SW | 1% |
| Friday | 64°F | Partly Sunny then Slight Chance Light Rain | 3 to 9 mph SW | 21% |
| Friday Night | 42°F | Chance Light Rain | 6 to 9 mph W | 30% |
| Saturday | 53°F | Chance Light Rain | 9 to 14 mph W | 29% |
| Saturday Night | 36°F | Chance Light Rain | 6 to 12 mph W | 25% |
| Sunday | 55°F | Partly Sunny | 7 to 15 mph W | 7% |
| Sunday Night | 34°F | Partly Cloudy | 8 to 12 mph W | 5% |
| Monday | 56°F | Mostly Sunny | 8 to 14 mph W | 10% |
| Monday Night | 35°F | Mostly Clear | 7 to 10 mph SW | 8% |
| Tuesday | 60°F | Mostly Sunny | 12 to 16 mph SW | 3% |
| Tuesday Night | 35°F | Partly Cloudy | 5 to 10 mph W | 3% |
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 Nov 4, 2026.