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Caln, PA
Full City Profile · Pennsylvania · Chester County County
3.3
/5.0
B
Good
2,074
Population
2,593/sq mi density
$71,728
Median Income
$29,314 per capita
$243,500
Home Value
$402,339 Zillow
$1,329
Median Rent
28.5% income on rent
53°F
Avg Temperature
290 sunny days/yr
997
Violent Crime/100K
2,504 property/100K
B
Overall
3.3 / 5.0
Good overall score based on economy, affordability, safety and education
B+
Economy
3.9 / 5.0
$71,728 median income, 3.5% unemployment
A+
Affordability
4.8 / 5.0
$243,500 home value, $1,329/mo rent
F
Safety
1.0 / 5.0
997 violent crimes/100K (162% above avg)
B
Education
3.3 / 5.0
29.1% bachelor's degree or higher
Caln 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. The area gets 290 sunny days per year. 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 40.
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) |
| Sunny Days | 290 days/yr |
Geography
| Elevation | 365 ft (111 m) |
| Area | 0.8 sq mi (2.1 km²) |
| Population Density | 2,593/sq mi |
| Coordinates | 39.9971°N, 75.7829°W |
| Timezone | America/New_York |
| County | Chester County County |
| Nearest Airport | Reading Regional/Carl A Spaatz Field (RDG) 28 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) | 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 | — | — | 107 km |
| 1840 | PHILADELPHIA, PENNSYLVANIA | Earthquake | — | — | 54 km |
Source: NOAA/NCEI Historical Tsunami Database. Sorted by wave height.
Monthly Weather
| Month | Avg Temperature | Precipitation | Summary |
|---|---|---|---|
| January | 30°F (-1°C) | 3.7 in | Coldest |
| February | 32°F (-0°C) | 2.9 in | Driest |
| March | 41°F (5°C) | 3.8 in | |
| April | 50°F (10°C) | 3.8 in | |
| May | 60°F (16°C) | 4.4 in | |
| June | 69°F (21°C) | 4.2 in | |
| July | 75°F (24°C) | 4.6 in | Warmest, Wettest |
| August | 73°F (23°C) | 3.9 in | |
| September | 66°F (19°C) | 4.3 in | |
| October | 54°F (12°C) | 3.4 in | |
| November | 45°F (7°C) | 3.9 in | |
| December | 35°F (2°C) | 3.7 in |
Caln has a seasonal temperature swing of 45°F / from 30°F in January to 75°F in July. Total annual precipitation is 46.5 inches, with July being the wettest month (4.6") and February the driest (2.9").