Pen Mar, PA Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Pen Mar, a community in Franklin County, Pennsylvania.
This Afternoon
80°F
Partly Sunny
Partly sunny, with a high near 80. North wind around 7 mph.
7-day forecast for Pen Mar
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 80°F | Partly Sunny | 7 mph N | 5% |
| Tonight | 56°F | Partly Cloudy | 8 mph NE | 0% |
| Saturday | 76°F | Mostly Sunny | 3 to 7 mph E | 2% |
| Saturday Night | 64°F | Mostly Cloudy then Chance Rain Showers | 5 to 12 mph SE | 36% |
| Sunday | 78°F | Showers And Thunderstorms | 7 to 12 mph S | 81% |
| Sunday Night | 61°F | Showers And Thunderstorms | 2 to 12 mph NW | 81% |
| Monday | 69°F | Chance Rain Showers | 8 to 12 mph NE | 38% |
| Monday Night | 57°F | Rain Showers Likely | 8 to 16 mph NE | 57% |
| Tuesday | 61°F | Rain Showers Likely | 10 to 16 mph E | 71% |
| Tuesday Night | 51°F | Rain Showers Likely | 12 to 17 mph NE | 71% |
| Wednesday | 58°F | Rain Showers Likely | 10 to 17 mph NE | 57% |
| Wednesday Night | 52°F | Chance Showers And Thunderstorms | 12 to 16 mph NE | 53% |
| Thursday | 61°F | Chance Showers And Thunderstorms | 8 to 15 mph NE | 51% |
| Thursday Night | 52°F | Chance Rain Showers | 8 mph NE | 39% |
Forecast source: National Weather Service (api.weather.gov) for Pen Mar (39.726, -77.516). Updated through the day.
Growing snapshot for Pen Mar
Last spring frost
Apr 25
First fall frost
Oct 19
Growing season
176 days
More local growing data for Pen Mar: nearby ZIP 17250 weather · frost dates · planting calendar · Pennsylvania frost dates
Nearby towns & communities
Blue Ridge Summit
Chambersburg
Fayetteville
Fort Loudon
Greencastle
Guilford
Marion
Mercersburg
Mont Alto
Orrstown
Rouzerville
Scotland
State Line
Wayne Heights
Waynesboro
Climate data from the nearest NOAA station, Smithsburg 2Nw, Md (6 mi from Pen Mar). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 18, 2026.