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Delta, PA
Full City Profile · Pennsylvania · Harford County County
3.1
/5.0
B
Good
687
Population
2,642/sq mi density
$67,386
Median Income
$36,484 per capita
$201,400
Home Value
$307,776 Zillow
$1,036
Median Rent
20.8% income on rent
55°F
Avg Temperature
293 sunny days/yr
75
Violent Crime/100K
2,089 property/100K
B
Overall
3.1 / 5.0
Good overall score based on economy, affordability, safety and education
A
Economy
4.0 / 5.0
$67,386 median income, 4.4% unemployment
A+
Affordability
5.0 / 5.0
$201,400 home value, $1,036/mo rent
F
Safety
1.0 / 5.0
75 violent crimes/100K
C
Education
2.3 / 5.0
16.2% bachelor's degree or higher
Delta experiences four distinct seasons with an average annual temperature of 55°F (13°C). Winters average 33°F in January while summers reach 78°F in July. The area gets 293 sunny days per year. Annual precipitation totals 48.3 inches. Air quality is rated Good with a median AQI of 40.
Temperature
33°F Jan (0°C)
78°F Jul (26°C)
| Annual Average | 55.4°F |
| 3% above US avg | |
| January Average | 33°F (0°C) |
| July Average | 78°F (26°C) |
| Sunny Days | 293 days/yr |
Geography
| Elevation | 461 ft (141 m) |
| Area | 0.1 sq mi (0.3 km²) |
| Population Density | 2,642/sq mi |
| Coordinates | 39.7267°N, 76.3271°W |
| Timezone | America/New_York |
| County | Harford County County |
| Nearest Airport | Harrisburg International (MDT) 40 miles away |
Precipitation & Snow
Air Quality
| AQI Median | 40.0 |
| Rating | Good |
Air Pollutants (EPA 2023)
| Ozone (O₃) | 0.0479 ppm |
| PM2.5 (Fine Particles) | 7.2 μg/m³ |
Natural Hazard Risk
| Overall Risk | Relatively Low |
| Risk Score | 72.5 / 100 |
| Social Vulnerability | 10.6 / 100 |
| Community Resilience | 91.6 / 100 |
Hazard Breakdown
| Tornado | Relatively Low |
| Hurricane | Relatively Moderate |
| Earthquake | Relatively Low |
| Wildfire | Very Low |
| Flood | Relatively Moderate |
| Hail | Very Low |
| Strong Wind | Relatively Moderate |
| Heat Wave | Relatively Moderate |
| Winter Weather | Relatively High |
| Lightning | Relatively Moderate |
| Ice Storm | Relatively Low |
| Drought | Relatively Moderate |
| Cold Wave | Relatively Moderate |
| Landslide | Very Low |
| Coastal Flood | 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 | — | — | 97 km |
Source: NOAA/NCEI Historical Tsunami Database. Sorted by wave height.
Monthly Weather
| Month | Avg Temperature | Precipitation | Summary |
|---|---|---|---|
| January | 33°F (0°C) | 3.2 in | |
| February | 32°F (0°C) | 2.7 in | Coldest, Driest |
| March | 41°F (5°C) | 3.3 in | |
| April | 51°F (11°C) | 3.6 in | |
| May | 61°F (16°C) | 4.1 in | |
| June | 70°F (21°C) | 4.1 in | |
| July | 78°F (26°C) | 4.2 in | Warmest, Wettest |
| August | 74°F (23°C) | 3.9 in | |
| September | 67°F (19°C) | 3.7 in | |
| October | 55°F (13°C) | 3.1 in | |
| November | 46°F (8°C) | 3.6 in | |
| December | 36°F (2°C) | 3.5 in |
Delta has a seasonal temperature swing of 46°F / from 32°F in February to 78°F in July. Total annual precipitation is 42.7 inches, with July being the wettest month (4.2") and February the driest (2.7").