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Jefferson borough (York County), PA
Full City Profile · Pennsylvania · York County County
3.2
/5.0
B
Good
528
Population
866/sq mi density
$83,750
Median Income
$38,865 per capita
$206,800
Home Value
$319,881 Zillow
$1,179
Median Rent
21.8% income on rent
54°F
Avg Temperature
293 sunny days/yr
228
Violent Crime/100K
2,685 property/100K
B
Overall
3.2 / 5.0
Good overall score based on economy, affordability, safety and education
A+
Economy
4.5 / 5.0
$83,750 median income, 3.0% unemployment
A+
Affordability
5.0 / 5.0
$206,800 home value, $1,179/mo rent
F
Safety
1.0 / 5.0
228 violent crimes/100K
C
Education
2.2 / 5.0
15.1% bachelor's degree or higher
Jefferson borough (York County) experiences four distinct seasons with an average annual temperature of 54°F (12°C). Winters average 32°F in January while summers reach 75°F in July. The area gets 293 sunny days per year. Annual precipitation totals 47.9 inches. The area receives 34.1 inches of snow annually. Air quality is rated Good with a median AQI of 40.
Temperature
32°F Jan (-0°C)
75°F Jul (24°C)
| Annual Average | 53.7°F |
| 1% below US avg | |
| January Average | 32°F (-0°C) |
| July Average | 75°F (24°C) |
| Sunny Days | 293 days/yr |
Geography
| Elevation | 735 ft (224 m) |
| Area | 0.2 sq mi (0.6 km²) |
| Population Density | 866/sq mi |
| Coordinates | 39.8123°N, 76.8430°W |
| Timezone | America/New_York |
| County | York County County |
| Nearest Airport | Gettysburg Regional (GTY) 23 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 | — | — | 140 km |
Source: NOAA/NCEI Historical Tsunami Database. Sorted by wave height.
Monthly Weather
| Month | Avg Temperature | Precipitation | Summary |
|---|---|---|---|
| January | 32°F (-0°C) | 3.2 in | |
| February | 31°F (-0°C) | 2.8 in | Coldest, Driest |
| March | 41°F (5°C) | 3.6 in | |
| April | 51°F (10°C) | 3.5 in | |
| May | 61°F (16°C) | 4.4 in | Wettest |
| June | 69°F (21°C) | 4.1 in | |
| July | 75°F (24°C) | 3.8 in | Warmest |
| August | 72°F (22°C) | 3.6 in | |
| September | 66°F (19°C) | 4.1 in | |
| October | 54°F (12°C) | 3.5 in | |
| November | 44°F (7°C) | 3.6 in | |
| December | 35°F (1°C) | 3.4 in |
Jefferson borough (York County) has a seasonal temperature swing of 43°F / from 31°F in February to 75°F in July. Total annual precipitation is 43.3 inches, with May being the wettest month (4.4") and February the driest (2.8").