Jefferson, PA Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Jefferson, a borough in York County, Pennsylvania.
This Afternoon
80°F
Mostly Sunny
Mostly sunny, with a high near 80. North wind around 9 mph.
7-day forecast for Jefferson
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 80°F | Mostly Sunny | 9 mph N | 1% |
| Tonight | 54°F | Partly Cloudy | 5 to 8 mph N | 0% |
| Saturday | 76°F | Mostly Sunny | 5 mph E | 3% |
| Saturday Night | 63°F | Mostly Cloudy then Slight Chance Rain Showers | 5 to 10 mph SE | 22% |
| Sunday | 78°F | Showers And Thunderstorms | 8 to 13 mph S | 78% |
| Sunday Night | 61°F | Showers And Thunderstorms | 5 to 9 mph NW | 78% |
| Monday | 70°F | Chance Rain Showers | 9 mph NE | 39% |
| Monday Night | 56°F | Chance Rain Showers | 7 to 10 mph NE | 46% |
| Tuesday | 62°F | Rain Showers Likely | 12 mph NE | 61% |
| Tuesday Night | 51°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 | 61°F | Chance Showers And Thunderstorms | 12 mph NE | 45% |
| Thursday Night | 51°F | Chance Showers And Thunderstorms | 3 to 8 mph N | 41% |
Forecast source: National Weather Service (api.weather.gov) for Jefferson (39.812, -76.843). Updated through the day.
Growing snapshot for Jefferson
Last spring frost
Apr 19
First fall frost
Oct 25
Growing season
188 days
Hardiness zone
7a
More local growing data for Jefferson: nearby ZIP 17311 weather · frost dates · planting calendar · Pennsylvania frost dates
Nearby towns & communities
Cross Roads
Dallastown
Delta
Dillsburg
Dover
East Prospect
East York
Emigsville
Fawn Grove
Felton
Franklintown
Glen Rock
Goldsboro
Grantley
Hallam
Hanover
Jacobus
Lewisberry
Loganville
Manchester
Mount Royal
Mount Wolf
New Freedom
New Market
New Salem
North York
Parkville
Pennville
Pleasureville
Queens Gate
Climate data from the nearest NOAA station, Millers 4 Ne, Md (7.1 mi from Jefferson). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 18, 2026.