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Yorklyn, PA
Full City Profile · Pennsylvania · York County County
3.2
/5.0
B
Good
1,402
Population
3,116/sq mi density
$75,746
Median Income
$44,002 per capita
$194,200
Home Value
$315,391 Zillow
$1,138
Median Rent
17.7% income on rent
54°F
Avg Temperature
293 sunny days/yr
883
Violent Crime/100K
3,285 property/100K
B
Overall
3.2 / 5.0
Good overall score based on economy, affordability, safety and education
A+
Economy
4.5 / 5.0
$75,746 median income, 1.2% unemployment
A+
Affordability
5.0 / 5.0
$194,200 home value, $1,138/mo rent
F
Safety
1.0 / 5.0
883 violent crimes/100K (132% above avg)
C
Education
2.2 / 5.0
15.5% bachelor's degree or higher
Yorklyn experiences four distinct seasons with an average annual temperature of 54°F (12°C). Winters average 31°F in January while summers reach 75°F in July. The area gets 293 sunny days per year. Annual precipitation totals 46.5 inches. The area receives 24.6 inches of snow annually. Air quality is rated Good with a median AQI of 40.
Temperature
31°F Jan (-0°C)
75°F Jul (24°C)
| Annual Average | 54.0°F |
| 0% below US avg | |
| January Average | 31°F (-0°C) |
| July Average | 75°F (24°C) |
| Sunny Days | 293 days/yr |
Geography
| Elevation | 422 ft (129 m) |
| Area | 0.5 sq mi (1.2 km²) |
| Population Density | 3,116/sq mi |
| Coordinates | 39.9929°N, 76.6428°W |
| Timezone | America/New_York |
| County | York County County |
| Nearest Airport | Harrisburg International (MDT) 15 miles away |
Precipitation & Snow
Air Quality
| AQI Median | 40.0 |
| Rating | Good |
Air Pollutants (EPA 2023)
| Ozone (O₃) | 0.0476 ppm |
| NO₂ (Nitrogen Dioxide) | 14.2 ppb |
| SO₂ (Sulfur Dioxide) | 0.63 ppb |
| PM2.5 (Fine Particles) | 10.5 μg/m³ |
Natural Hazard Risk
| Overall Risk | Relatively Moderate |
| Risk Score | 90.4 / 100 |
| Social Vulnerability | 17.1 / 100 |
| Community Resilience | 83.5 / 100 |
Hazard Breakdown
| Tornado | Relatively Low |
| Hurricane | Relatively Moderate |
| Earthquake | Relatively Low |
| Wildfire | Very Low |
| Flood | Relatively High |
| Hail | Very Low |
| 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 Moderate |
| 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 | — | — | 125 km |
Source: NOAA/NCEI Historical Tsunami Database. Sorted by wave height.
Monthly Weather
| Month | Avg Temperature | Precipitation | Summary |
|---|---|---|---|
| January | 31°F (-0°C) | 3.1 in | Coldest |
| February | 31°F (-0°C) | 2.7 in | Driest |
| March | 40°F (5°C) | 3.4 in | |
| April | 50°F (10°C) | 3.6 in | |
| May | 61°F (16°C) | 4.3 in | Wettest |
| June | 69°F (21°C) | 4.1 in | |
| July | 75°F (24°C) | 4.2 in | Warmest |
| August | 73°F (23°C) | 3.6 in | |
| September | 66°F (19°C) | 3.8 in | |
| October | 54°F (12°C) | 3.2 in | |
| November | 44°F (7°C) | 3.6 in | |
| December | 35°F (1°C) | 3.3 in |
Yorklyn has a seasonal temperature swing of 44°F / from 31°F in January to 75°F in July. Total annual precipitation is 42.7 inches, with May being the wettest month (4.3") and February the driest (2.7").