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Arnold, PA
Full City Profile · Pennsylvania · Allegheny County County
2.8
/5.0
C+
Fair
4,738
Population
6,490/sq mi density
$48,119
Median Income
$26,869 per capita
$76,800
Home Value
$79,546 Zillow
$799
Median Rent
23.7% income on rent
52°F
Avg Temperature
275 sunny days/yr
534
Violent Crime/100K
1,662 property/100K
C+
Overall
2.8 / 5.0
Fair overall score based on economy, affordability, safety and education
C+
Economy
2.8 / 5.0
$48,119 median income, 6.8% unemployment
A+
Affordability
5.0 / 5.0
$76,800 home value, $799/mo rent
F
Safety
1.0 / 5.0
534 violent crimes/100K (41% above avg)
C
Education
2.3 / 5.0
16.6% bachelor's degree or higher
Arnold experiences four distinct seasons with an average annual temperature of 52°F (11°C). Winters average 29°F in January while summers reach 73°F in July. The area gets 275 sunny days per year. Annual precipitation totals 42.2 inches. Air quality is rated Good with a median AQI of 40.
Temperature
29°F Jan (-2°C)
73°F Jul (23°C)
| Annual Average | 51.5°F |
| 5% below US avg | |
| January Average | 29°F (-2°C) |
| July Average | 73°F (23°C) |
| Sunny Days | 275 days/yr |
Geography
| Elevation | 812 ft (247 m) |
| Area | 0.3 sq mi (0.8 km²) |
| Population Density | 6,490/sq mi |
| Coordinates | 40.5789°N, 79.7653°W |
| Timezone | America/New_York |
| County | Allegheny County County |
| Nearest Airport | Pittsburgh/Butler Regional (BTP) 17 miles away |
Precipitation & Snow
Air Quality
| AQI Median | 40.0 |
| Rating | Good |
Air Pollutants (EPA 2023)
| Ozone (O₃) | 0.0432 ppm |
| NO₂ (Nitrogen Dioxide) | 11.6 ppb |
| SO₂ (Sulfur Dioxide) | 2.41 ppb |
| CO (Carbon Monoxide) | 0.39 ppm |
| PM2.5 (Fine Particles) | 10.2 μg/m³ |
Natural Hazard Risk
| Overall Risk | Relatively High |
| Risk Score | 98.1 / 100 |
| Social Vulnerability | 32.7 / 100 |
| Community Resilience | 91.9 / 100 |
Hazard Breakdown
| Tornado | Relatively High |
| Hurricane | Relatively Low |
| Earthquake | Relatively Low |
| Wildfire | Very Low |
| Flood | Very High |
| Hail | Very Low |
| Strong Wind | Relatively High |
| Heat Wave | Relatively Moderate |
| Winter Weather | Relatively High |
| Lightning | Relatively High |
| Ice Storm | Very High |
| Drought | No Rating |
| Cold Wave | Very High |
| Landslide | Relatively Low |
| Avalanche | Very Low |
Source: FEMA National Risk Index v1.20 (Dec 2025)
Monthly Weather
| Month | Avg Temperature | Precipitation | Summary |
|---|---|---|---|
| January | 29°F (-2°C) | 2.5 in | Coldest |
| February | 30°F (-1°C) | 2.4 in | Driest |
| March | 39°F (4°C) | 3.4 in | |
| April | 49°F (9°C) | 3.4 in | |
| May | 59°F (15°C) | 4.0 in | |
| June | 67°F (20°C) | 4.1 in | |
| July | 73°F (23°C) | 4.1 in | Warmest, Wettest |
| August | 70°F (21°C) | 3.7 in | |
| September | 64°F (18°C) | 3.4 in | |
| October | 52°F (11°C) | 2.7 in | |
| November | 42°F (6°C) | 3.2 in | |
| December | 32°F (0°C) | 3.0 in |
Arnold has a seasonal temperature swing of 45°F / from 29°F in January to 73°F in July. Total annual precipitation is 39.8 inches, with July being the wettest month (4.1") and February the driest (2.4").