Atglen, PA
Full City Profile · Pennsylvania · Chester County County
4.3
/5.0
A
Great
1,319
Population
1,499/sq mi density
$100,000
Median Income
$37,534 per capita
$289,900
Home Value
$434,147 Zillow
$1,183
Median Rent
51.0% income on rent
53°F
Avg Temperature
A
Overall
4.3 / 5.0
Strong
A
Economy
4.1 / 5.0
$100,000 median income, 4.1% unemployment
A+
Affordability
5.0 / 5.0
$289,900 home value, $1,183/mo rent
B+
Education
3.7 / 5.0
33.4% bachelor's degree or higher
Atglen experiences four distinct seasons with an average annual temperature of 53°F (12°C). Winters average 30°F in January while summers reach 75°F in July. Annual precipitation totals 52.1 inches. The area receives 31.9 inches of snow annually. Air quality is rated Good with a median AQI of 41.
Temperature
30°F Jan (-1°C)
75°F Jul (24°C)
| Annual Average | 52.8°F |
| 2% below US avg | |
| January Average | 30°F (-1°C) |
| July Average | 75°F (24°C) |
Geography
| Elevation | 489 ft (149 m) |
| Area | 0.3 sq mi (0.9 km²) |
| Population Density | 1,499/sq mi |
| Coordinates | 39.9475°N, 75.9750°W |
| Timezone | America/New_York |
| County | Chester County County |
| Nearest Airport | Reading Regional/Carl A Spaatz Field (RDG) 30 miles away |
Precipitation & Snow
Air Quality
| AQI Median | 41.0 |
| Rating | Good |
| Good Days % | 72.7% |
| Unhealthy Days | 3 |
Air Pollutants (EPA 2023)
| Ozone (O₃) | 0.0450 ppm |
| PM2.5 (Fine Particles) | 9.5 μg/m³ |
Natural Hazard Risk
| Overall Risk | Relatively Moderate |
| Risk Score | 91.9 / 100 |
| Social Vulnerability | 10.6 / 100 |
| Community Resilience | 85.2 / 100 |
Hazard Breakdown
| Tornado | Relatively Moderate |
| Hurricane | Relatively Moderate |
| Earthquake | Relatively Moderate |
| Wildfire | Very Low |
| Flood | Relatively High |
| Hail | Relatively Low |
| Strong Wind | Relatively High |
| Heat Wave | Relatively Moderate |
| Winter Weather | Very High |
| Lightning | Relatively High |
| Ice Storm | Relatively High |
| Drought | Relatively High |
| Cold Wave | Relatively Moderate |
| 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 | - | - | 122 km |
| 1840 | PHILADELPHIA, PENNSYLVANIA | Earthquake | - | - | 68 km |
Source: NOAA/NCEI Historical Tsunami Database. Sorted by wave height.
Monthly Weather
| Month | Avg Temperature | Precipitation | Summary |
|---|---|---|---|
| January | 30°F (-1°C) | 4.1 in | Coldest |
| February | 32°F (0°C) | 3.3 in | Driest |
| March | 40°F (5°C) | 4.8 in | |
| April | 51°F (11°C) | 4.1 in | |
| May | 62°F (16°C) | 4.0 in | |
| June | 70°F (21°C) | 4.5 in | |
| July | 75°F (24°C) | 4.6 in | Warmest |
| August | 73°F (23°C) | 4.6 in | |
| September | 66°F (19°C) | 5.2 in | Wettest |
| October | 54°F (12°C) | 4.6 in | |
| November | 44°F (7°C) | 3.6 in | |
| December | 35°F (2°C) | 4.8 in |
Atglen has a seasonal temperature swing of 45°F / from 30°F in January to 75°F in July. Total annual precipitation is 52.1 inches, with September being the wettest month (5.2") and February the driest (3.3").