Clay, PA
Full City Profile · Pennsylvania · Lancaster County County
4.0
/5.0
A
Great
1,576
Population
704/sq mi density
$82,094
Median Income
$43,893 per capita
$265,300
Home Value
$336,820 Zillow
$916
Median Rent
23.2% income on rent
53°F
Avg Temperature
A
Overall
4.0 / 5.0
Strong
A+
Economy
4.6 / 5.0
$82,094 median income, 0.0% unemployment
A+
Affordability
4.9 / 5.0
$265,300 home value, $916/mo rent
C+
Education
2.5 / 5.0
19.1% bachelor's degree or higher
Clay experiences four distinct seasons with an average annual temperature of 53°F (12°C). Winters average 31°F in January while summers reach 75°F in July. Annual precipitation totals 42.1 inches. The area receives 21.4 inches of snow annually. Air quality is rated Moderate with a median AQI of 50.
Temperature
31°F Jan (-1°C)
75°F Jul (24°C)
| Annual Average | 53.3°F |
| 1% below US avg | |
| January Average | 31°F (-1°C) |
| July Average | 75°F (24°C) |
Geography
| Elevation | 394 ft (120 m) |
| Area | 2.2 sq mi (5.8 km²) |
| Population Density | 704/sq mi |
| Coordinates | 40.2190°N, 76.2390°W |
| Timezone | America/New_York |
| County | Lancaster County County |
| Nearest Airport | Reading Regional/Carl A Spaatz Field (RDG) 18 miles away |
Precipitation & Snow
Air Quality
| AQI Median | 50.0 |
| Rating | Good |
| Good Days % | 51.6% |
| Unhealthy Days | 3 |
Air Pollutants (EPA 2023)
| Ozone (O₃) | 0.0450 ppm |
| PM2.5 (Fine Particles) | 11.7 μg/m³ |
Natural Hazard Risk
| Overall Risk | Relatively High |
| Risk Score | 95.0 / 100 |
| Social Vulnerability | 43.5 / 100 |
| Community Resilience | 70.1 / 100 |
Hazard Breakdown
| Tornado | Relatively Moderate |
| Hurricane | Relatively High |
| Earthquake | Relatively Moderate |
| Wildfire | Very Low |
| Flood | Relatively High |
| Hail | Relatively Moderate |
| 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 High |
| Landslide | Relatively Low |
| 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 | - | - | 125 km |
| 1840 | PHILADELPHIA, PENNSYLVANIA | Earthquake | - | - | 100 km |
Source: NOAA/NCEI Historical Tsunami Database. Sorted by wave height.
Monthly Weather
| Month | Avg Temperature | Precipitation | Summary |
|---|---|---|---|
| January | 31°F (-1°C) | 2.6 in | Coldest |
| February | 33°F (0°C) | 2.2 in | Driest |
| March | 41°F (5°C) | 3.3 in | |
| April | 52°F (11°C) | 3.3 in | |
| May | 62°F (17°C) | 3.4 in | |
| June | 71°F (22°C) | 4.8 in | Wettest |
| July | 75°F (24°C) | 4.2 in | Warmest |
| August | 74°F (23°C) | 3.5 in | |
| September | 67°F (19°C) | 4.7 in | |
| October | 55°F (13°C) | 3.8 in | |
| November | 44°F (7°C) | 3.1 in | |
| December | 35°F (2°C) | 3.1 in |
Clay has a seasonal temperature swing of 45°F / from 31°F in January to 75°F in July. Total annual precipitation is 42.1 inches, with June being the wettest month (4.8") and February the driest (2.2").