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
71°F
Mostly Sunny
Mostly sunny. High near 71, with temperatures falling to around 65 in the afternoon. Southeast wind around 6 mph.
7-day forecast for Pen Mar
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 71°F | Mostly Sunny | 6 mph SE | 1% |
| Tonight | 52°F | Mostly Clear | 7 mph S | 1% |
| Wednesday | 73°F | Mostly Sunny | 6 to 13 mph S | 2% |
| Wednesday Night | 61°F | Mostly Cloudy then Rain Showers | 12 mph S | 86% |
| Thursday | 73°F | Rain Showers | 6 to 13 mph S | 80% |
| Thursday Night | 59°F | Rain Showers Likely | 1 to 5 mph W | 55% |
| Friday | 68°F | Chance Rain Showers | 3 mph NW | 54% |
| Friday Night | 48°F | Chance Rain Showers then Partly Cloudy | 1 to 5 mph NW | 45% |
| Saturday | 62°F | Mostly Sunny | 5 to 13 mph NW | 13% |
| Saturday Night | 41°F | Partly Cloudy | 5 to 10 mph NW | 13% |
| Sunday | 59°F | Mostly Sunny | 5 to 9 mph W | 7% |
| Sunday Night | 40°F | Partly Cloudy then Slight Chance Rain Showers | 9 mph W | 22% |
| Monday | 59°F | Slight Chance Rain Showers | 9 to 16 mph W | 23% |
| Monday Night | 39°F | Slight Chance Rain Showers | 10 mph W | 23% |
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 Nov 3, 2026.