Harleysville, PA
Full City Profile · Pennsylvania · Montgomery County County
4.6
/5.0
A+
Excellent
9,034
Population
2,161/sq mi density
$111,530
Median Income
$58,704 per capita
$416,400
Home Value
$544,428 Zillow
$1,712
Median Rent
30.7% income on rent
52°F
Avg Temperature
A+
Overall
4.6 / 5.0
Strong
A+
Economy
4.9 / 5.0
$111,530 median income, 2.6% unemployment
A+
Affordability
4.6 / 5.0
$416,400 home value, $1,712/mo rent
A
Education
4.2 / 5.0
40.5% bachelor's degree or higher
Harleysville experiences four distinct seasons with an average annual temperature of 52°F (11°C). Winters average 30°F in January while summers reach 75°F in July. Annual precipitation totals 48.5 inches. The area receives 12.9 inches of snow annually. Air quality is rated Good with a median AQI of 40.
Temperature
30°F Jan (-1°C)
75°F Jul (24°C)
| Annual Average | 52.4°F |
| 3% below US avg | |
| January Average | 30°F (-1°C) |
| July Average | 75°F (24°C) |
Geography
| Elevation | 280 ft (85 m) |
| Area | 4.2 sq mi (10.8 km²) |
| Population Density | 2,161/sq mi |
| Coordinates | 40.2784°N, 75.3879°W |
| Timezone | America/New_York |
| County | Montgomery County County |
| Nearest Airport | Lehigh Valley International (ABE) 26 miles away |
Precipitation & Snow
Air Quality
| AQI Median | 40.0 |
| Rating | Good |
| Good Days % | 72.9% |
| Unhealthy Days | 1 |
Air Pollutants (EPA 2023)
| Ozone (O₃) | 0.0436 ppm |
| PM2.5 (Fine Particles) | 9.3 μg/m³ |
Natural Hazard Risk
| Overall Risk | Relatively High |
| Risk Score | 96.8 / 100 |
| Social Vulnerability | 19.8 / 100 |
| Community Resilience | 92.8 / 100 |
Hazard Breakdown
| Tornado | Relatively High |
| Hurricane | Relatively Moderate |
| Earthquake | Relatively Moderate |
| Wildfire | Very Low |
| Flood | Relatively High |
| Hail | Relatively Low |
| Strong Wind | Very High |
| Heat Wave | Relatively High |
| Winter Weather | Very High |
| Lightning | Relatively Moderate |
| Ice Storm | Relatively Moderate |
| Drought | Relatively Low |
| Cold Wave | Relatively High |
| Landslide | Relatively Low |
| Coastal Flood | No Rating |
Source: FEMA National Risk Index v1.20 (Dec 2025)
Tsunami History
2 tsunamis recorded within 500 km.
| Year | Location | Cause | Max Wave | Deaths | Distance |
| 1895 | HIGH BRIDGE, NJ | Earthquake | - | - | 61 km |
| 1840 | PHILADELPHIA, PENNSYLVANIA | Earthquake | - | - | 56 km |
Source: NOAA/NCEI Historical Tsunami Database. Sorted by wave height.
Monthly Weather
| Month | Avg Temperature | Precipitation | Summary |
|---|---|---|---|
| January | 30°F (-1°C) | 3.3 in | Coldest |
| February | 32°F (0°C) | 2.6 in | Driest |
| March | 40°F (4°C) | 3.9 in | |
| April | 51°F (10°C) | 3.8 in | |
| May | 61°F (16°C) | 4.0 in | |
| June | 70°F (21°C) | 4.2 in | |
| July | 75°F (24°C) | 5.0 in | Warmest, Wettest |
| August | 73°F (23°C) | 4.6 in | |
| September | 65°F (19°C) | 4.9 in | |
| October | 54°F (12°C) | 4.5 in | |
| November | 44°F (7°C) | 3.4 in | |
| December | 35°F (2°C) | 4.4 in |
Harleysville has a seasonal temperature swing of 45°F / from 30°F in January to 75°F in July. Total annual precipitation is 48.5 inches, with July being the wettest month (5.0") and February the driest (2.6").