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Aldan, PA
Full City Profile · Pennsylvania · Delaware County County
3.4
/5.0
B
Good
4,219
Population
7,032/sq mi density
$78,147
Median Income
$36,976 per capita
$227,900
Home Value
$256,298 Zillow
$1,191
Median Rent
42.0% income on rent
56°F
Avg Temperature
293 sunny days/yr
96
Violent Crime/100K
2,766 property/100K
B
Overall
3.4 / 5.0
Good overall score based on economy, affordability, safety and education
A
Economy
4.4 / 5.0
$78,147 median income, 1.9% unemployment
A+
Affordability
5.0 / 5.0
$227,900 home value, $1,191/mo rent
F
Safety
1.0 / 5.0
96 violent crimes/100K
B
Education
3.3 / 5.0
28.8% bachelor's degree or higher
Aldan enjoys a temperate climate with an average annual temperature of 56°F (13°C). Winters average 34°F in January while summers reach 79°F in July. The area gets 293 sunny days per year. Annual precipitation totals 44.1 inches. The area receives 23.1 inches of snow annually. Air quality is rated Good with a median AQI of 40.
Temperature
34°F Jan (1°C)
79°F Jul (26°C)
| Annual Average | 56.3°F |
| 4% above US avg | |
| January Average | 34°F (1°C) |
| July Average | 79°F (26°C) |
| Sunny Days | 293 days/yr |
Geography
| Elevation | 130 ft (40 m) |
| Area | 0.2 sq mi (0.6 km²) |
| Population Density | 7,032/sq mi |
| Coordinates | 39.9224°N, 75.2881°W |
| Timezone | America/New_York |
| County | Delaware County County |
| Nearest Airport | Philadelphia International (PHL) 4 miles away |
Precipitation & Snow
Air Quality
| AQI Median | 40.0 |
| Rating | Good |
Air Pollutants (EPA 2023)
| Ozone (O₃) | 0.0484 ppm |
| NO₂ (Nitrogen Dioxide) | 15.0 ppb |
| PM2.5 (Fine Particles) | 10.3 μg/m³ |
Natural Hazard Risk
| Overall Risk | Relatively Moderate |
| Risk Score | 92.9 / 100 |
| Social Vulnerability | 33.0 / 100 |
| Community Resilience | 84.3 / 100 |
Hazard Breakdown
| Tornado | Relatively High |
| Hurricane | Relatively Moderate |
| Earthquake | Relatively Moderate |
| Wildfire | Very Low |
| Flood | Relatively High |
| Hail | Very Low |
| Strong Wind | Relatively High |
| Heat Wave | Relatively High |
| Winter Weather | Very High |
| Lightning | Relatively High |
| Ice Storm | Relatively High |
| Drought | Relatively Low |
| Cold Wave | Relatively High |
| Landslide | Very Low |
| Coastal Flood | Relatively Moderate |
| Avalanche | Very Low |
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 | — | — | 90 km |
| 1840 | PHILADELPHIA, PENNSYLVANIA | Earthquake | — | — | 16 km |
Source: NOAA/NCEI Historical Tsunami Database. Sorted by wave height.
Monthly Weather
| Month | Avg Temperature | Precipitation | Summary |
|---|---|---|---|
| January | 34°F (1°C) | 3.5 in | Coldest |
| February | 34°F (1°C) | 2.8 in | Driest |
| March | 43°F (6°C) | 3.9 in | |
| April | 52°F (11°C) | 3.7 in | |
| May | 63°F (17°C) | 4.1 in | |
| June | 72°F (22°C) | 3.6 in | |
| July | 79°F (26°C) | 4.5 in | Warmest, Wettest |
| August | 75°F (24°C) | 4.2 in | |
| September | 68°F (20°C) | 3.9 in | |
| October | 57°F (14°C) | 3.0 in | |
| November | 47°F (8°C) | 3.5 in | |
| December | 37°F (3°C) | 3.5 in |
Aldan has a seasonal temperature swing of 45°F / from 34°F in January to 79°F in July. Total annual precipitation is 44.2 inches, with July being the wettest month (4.5") and February the driest (2.8").