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Hallam, PA
Full City Profile · Pennsylvania · Lancaster County County
3.3
/5.0
B
Good
2,772
Population
4,137/sq mi density
$71,138
Median Income
$30,696 per capita
$175,100
Home Value
$305,937 Zillow
$1,361
Median Rent
26.1% income on rent
54°F
Avg Temperature
275 sunny days/yr
307
Violent Crime/100K
1,610 property/100K
B
Overall
3.3 / 5.0
Good overall score based on economy, affordability, safety and education
B+
Economy
3.9 / 5.0
$71,138 median income, 1.6% unemployment
A+
Affordability
5.0 / 5.0
$175,100 home value, $1,361/mo rent
F
Safety
1.0 / 5.0
307 violent crimes/100K
B
Education
3.1 / 5.0
26.5% bachelor's degree or higher
Hallam experiences four distinct seasons with an average annual temperature of 54°F (12°C). Winters average 31°F in January while summers reach 77°F in July. The area gets 275 sunny days per year. Annual precipitation totals 44.2 inches. The area receives 29.9 inches of snow annually. Air quality is rated Good with a median AQI of 40.
Temperature
31°F Jan (-1°C)
77°F Jul (25°C)
| Annual Average | 54.3°F |
| 1% above US avg | |
| January Average | 31°F (-1°C) |
| July Average | 77°F (25°C) |
| Sunny Days | 275 days/yr |
Geography
| Elevation | 372 ft (113 m) |
| Area | 0.6 sq mi (1.7 km²) |
| Population Density | 4,137/sq mi |
| Coordinates | 40.0024°N, 76.6042°W |
| Timezone | America/New_York |
| County | Lancaster County County |
| Nearest Airport | Harrisburg International (MDT) 16 miles away |
Precipitation & Snow
Air Quality
| AQI Median | 40.0 |
| Rating | Good |
Air Pollutants (EPA 2023)
| Ozone (O₃) | 0.0450 ppm |
| PM2.5 (Fine Particles) | 11.7 μg/m³ |
Natural Hazard Risk
| Overall Risk | Relatively High |
| Risk Score | 95.0 / 100 |
| Social Vulnerability | 43.5 / 100 |
| Community Resilience | 70.1 / 100 |
Hazard Breakdown
| Tornado | Relatively Moderate |
| Hurricane | Relatively High |
| Earthquake | Relatively Moderate |
| Wildfire | Very Low |
| Flood | Relatively High |
| Hail | Relatively Moderate |
| Strong Wind | Relatively High |
| Heat Wave | Relatively Moderate |
| Winter Weather | Very High |
| Lightning | Relatively High |
| Ice Storm | Relatively Moderate |
| Drought | Relatively Moderate |
| Cold Wave | Relatively High |
| Landslide | Relatively Low |
| Avalanche | Very Low |
Source: FEMA National Risk Index v1.20 (Dec 2025)
Tsunami History
1 tsunami recorded within 500 km.
| Year | Location | Cause | Max Wave | Deaths | Distance |
| 1840 | PHILADELPHIA, PENNSYLVANIA | Earthquake | — | — | 122 km |
Source: NOAA/NCEI Historical Tsunami Database. Sorted by wave height.
Monthly Weather
| Month | Avg Temperature | Precipitation | Summary |
|---|---|---|---|
| January | 31°F (-1°C) | 3.0 in | Coldest |
| February | 31°F (-0°C) | 2.6 in | Driest |
| March | 40°F (5°C) | 3.2 in | |
| April | 51°F (10°C) | 3.5 in | |
| May | 61°F (16°C) | 4.2 in | |
| June | 70°F (21°C) | 4.1 in | |
| July | 77°F (25°C) | 4.3 in | Warmest, Wettest |
| August | 73°F (23°C) | 3.4 in | |
| September | 66°F (19°C) | 3.7 in | |
| October | 54°F (12°C) | 3.0 in | |
| November | 44°F (7°C) | 3.5 in | |
| December | 35°F (2°C) | 3.2 in |
Hallam has a seasonal temperature swing of 47°F / from 31°F in January to 77°F in July. Total annual precipitation is 41.7 inches, with July being the wettest month (4.3") and February the driest (2.6").