Pen Mar, PA
Full City Profile · Pennsylvania · Franklin County County
4.4
/5.0
A
Great
1,338
Population
1,808/sq mi density
$117,010
Median Income
$40,216 per capita
$264,100
Home Value
$269,344 Zillow
52°F
Avg Temperature
A
Overall
4.4 / 5.0
Strong
A+
Economy
4.7 / 5.0
$117,010 median income, 4.2% unemployment
A+
Affordability
5.0 / 5.0
$264,100 home value, /mo rent
B
Education
3.4 / 5.0
30.4% bachelor's degree or higher
Pen Mar experiences four distinct seasons with an average annual temperature of 52°F (11°C). Winters average 30°F in January while summers reach 74°F in July. Annual precipitation totals 48.6 inches. The area receives 33.0 inches of snow annually. Air quality is rated Good with a median AQI of 35.
Temperature
30°F Jan (-1°C)
74°F Jul (23°C)
| Annual Average | 52.3°F |
| 3% below US avg | |
| January Average | 30°F (-1°C) |
| July Average | 74°F (23°C) |
Geography
| Elevation | 930 ft (283 m) |
| Area | 0.7 sq mi (1.9 km²) |
| Population Density | 1,808/sq mi |
| Coordinates | 39.7263°N, 77.5160°W |
| Timezone | America/New_York |
| County | Franklin County County |
| Nearest Airport | Hagerstown Regional/Richard A Henson Field (HGR) 11 miles away |
Precipitation & Snow
Air Quality
| AQI Median | 35.0 |
| Rating | Good |
| Good Days % | 93.3% |
| Unhealthy Days | 0 |
Air Pollutants (EPA 2023)
| Ozone (O₃) | 0.0449 ppm |
Natural Hazard Risk
| Overall Risk | Relatively Low |
| Risk Score | 76.4 / 100 |
| Social Vulnerability | 32.4 / 100 |
| Community Resilience | 63.5 / 100 |
Hazard Breakdown
| Tornado | Relatively Low |
| Hurricane | Relatively Moderate |
| Earthquake | Relatively Low |
| Wildfire | Very Low |
| Flood | Relatively Moderate |
| Hail | Relatively Low |
| Strong Wind | Relatively Moderate |
| Heat Wave | Relatively Low |
| Winter Weather | Relatively Moderate |
| Lightning | Relatively Moderate |
| Ice Storm | Relatively Low |
| Drought | Relatively Moderate |
| Cold Wave | Very Low |
| Landslide | Relatively Low |
| Avalanche | Very Low |
Source: FEMA National Risk Index v1.20 (Dec 2025)
Monthly Weather
| Month | Avg Temperature | Precipitation | Summary |
|---|---|---|---|
| January | 30°F (-1°C) | 3.8 in | Coldest |
| February | 32°F (0°C) | 3.0 in | Driest |
| March | 40°F (4°C) | 4.4 in | |
| April | 51°F (11°C) | 4.0 in | |
| May | 61°F (16°C) | 4.9 in | |
| June | 70°F (21°C) | 4.2 in | |
| July | 74°F (23°C) | 3.7 in | Warmest |
| August | 72°F (22°C) | 4.0 in | |
| September | 65°F (19°C) | 5.3 in | Wettest |
| October | 54°F (12°C) | 4.1 in | |
| November | 43°F (6°C) | 3.7 in | |
| December | 35°F (1°C) | 3.5 in |
Pen Mar has a seasonal temperature swing of 44°F / from 30°F in January to 74°F in July. Total annual precipitation is 48.6 inches, with September being the wettest month (5.3") and February the driest (3.0").