Jefferson, PA Weather & Growing Conditions
Tonight
54°F
Partly Cloudy
Partly cloudy, with a low around 54. North wind 5 to 8 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 54°F | Partly Cloudy | 5 to 8 mph N | 0% |
| Saturday | 77°F | Mostly Sunny | 5 mph NE | 3% |
| Saturday Night | 63°F | Mostly Cloudy then Slight Chance Rain Showers | 5 to 10 mph SE | 24% |
| Sunday | 79°F | Showers And Thunderstorms | 8 to 13 mph S | 79% |
| Sunday Night | 61°F | Showers And Thunderstorms | 5 to 9 mph NW | 79% |
| Monday | 70°F | Chance Rain Showers | 10 mph NE | 40% |
| Monday Night | 56°F | Chance Rain Showers | 7 to 10 mph NE | 47% |
| Tuesday | 63°F | Rain Showers Likely | 12 mph NE | 61% |
| Tuesday Night | 52°F | Rain Showers Likely | 10 to 14 mph NE | 61% |
| Wednesday | 60°F | Chance Rain Showers | 13 mph NE | 50% |
| Wednesday Night | 51°F | Chance Showers And Thunderstorms | 8 to 12 mph NE | 50% |
| Thursday | 62°F | Chance Showers And Thunderstorms | 12 mph NE | 45% |
| Thursday Night | 52°F | Chance Showers And Thunderstorms | 3 to 8 mph N | 41% |
| Friday | 67°F | Slight Chance Rain Showers | 6 to 9 mph N | 24% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for Jefferson, PA
Last spring frost
Apr 19
First fall frost
Oct 25
Growing season
188 days
Hardiness zone
7a
Explore more for Jefferson, PA: full frost dates · planting calendar · Pennsylvania frost dates
Climate data from the nearest NOAA station, Millers 4 Ne, Md (7.1 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.