Jefferson, PA Weather & Growing Conditions
Today
76°F
Partly Sunny then Slight Chance Light Rain
A slight chance of rain after 5pm. Partly sunny, with a high near 76. South wind 1 to 9 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 76°F | Partly Sunny then Slight Chance Light Rain | 1 to 9 mph S | 12% |
| Tonight | 60°F | Light Rain | 10 mph S | 85% |
| Thursday | 70°F | Chance Light Rain then Partly Sunny | 7 to 13 mph SW | 31% |
| Thursday Night | 47°F | Partly Cloudy | 2 to 6 mph SW | 2% |
| Friday | 64°F | Partly Sunny then Slight Chance Light Rain | 2 to 8 mph SW | 17% |
| Friday Night | 40°F | Chance Light Rain | 2 to 7 mph W | 33% |
| Saturday | 53°F | Chance Light Rain | 7 to 12 mph W | 33% |
| Saturday Night | 34°F | Slight Chance Light Rain | 5 to 9 mph W | 24% |
| Sunday | 55°F | Partly Sunny | 5 to 13 mph W | 8% |
| Sunday Night | 32°F | Partly Cloudy | 9 mph SW | 5% |
| Monday | 56°F | Mostly Sunny | 7 to 13 mph W | 7% |
| Monday Night | 33°F | Mostly Clear | 6 to 9 mph SW | 7% |
| Tuesday | 60°F | Sunny | 10 to 14 mph SW | 3% |
| Tuesday Night | 33°F | Mostly Clear | 3 to 8 mph W | 3% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for Jefferson, PA
Last spring frost
May 3
First fall frost
Oct 15
Growing season
164 days
Hardiness zone
6b
Explore more for Jefferson, PA: full frost dates · planting calendar · Pennsylvania frost dates
Climate data from the nearest NOAA station, Waynesburg 1 E, Pa (6.3 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 4, 2026.