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Chester, PA
Full City Profile · Pennsylvania · Delaware County County
2.4
/5.0
C
Fair
33,209
Population
6,876/sq mi density
$39,809
Median Income
$23,451 per capita
$85,400
Home Value
$259,705 Zillow
$1,080
Median Rent
36.3% income on rent
57°F
Avg Temperature
293 sunny days/yr
1,383
Violent Crime/100K
3,005 property/100K
C
Overall
2.4 / 5.0
Fair overall score based on economy, affordability, safety and education
D
Economy
1.6 / 5.0
$39,809 median income, 10.4% unemployment
A+
Affordability
5.0 / 5.0
$85,400 home value, $1,080/mo rent
F
Safety
1.0 / 5.0
1,383 violent crimes/100K (264% above avg)
C
Education
2.1 / 5.0
13.3% bachelor's degree or higher
Chester enjoys a temperate climate with an average annual temperature of 57°F (14°C). Winters average 35°F in January while summers reach 80°F in July. The area gets 293 sunny days per year. Annual precipitation totals 41.7 inches. Air quality is rated Good with a median AQI of 41.
Temperature
35°F Jan (2°C)
80°F Jul (26°C)
| Annual Average | 57.1°F |
| 6% above US avg | |
| January Average | 35°F (2°C) |
| July Average | 80°F (26°C) |
| Sunny Days | 293 days/yr |
Geography
| Elevation | 56 ft (17 m) |
| Area | 6.0 sq mi (15.6 km²) |
| Population Density | 6,876/sq mi |
| Coordinates | 39.8456°N, 75.3719°W |
| Timezone | America/New_York |
| County | Delaware County County |
| Nearest Airport | Philadelphia International (PHL) 7 miles away |
Precipitation & Snow
Air Quality
| AQI Median | 41.0 |
| Rating | Good |
| Good Days % | 72.7% |
| Unhealthy Days | 3 |
Air Pollutants (EPA 2023)
| Ozone (O₃) | 0.0484 ppm |
| NO₂ (Nitrogen Dioxide) | 15.0 ppb |
| PM2.5 (Fine Particles) | 10.3 μg/m³ |
Natural Hazard Risk
| Overall Risk | Relatively Moderate |
| Risk Score | 92.9 / 100 |
| Social Vulnerability | 33.0 / 100 |
| Community Resilience | 84.3 / 100 |
Hazard Breakdown
| Tornado | Relatively High |
| Hurricane | Relatively Moderate |
| Earthquake | Relatively Moderate |
| Wildfire | Very Low |
| Flood | Relatively High |
| Hail | Very Low |
| Strong Wind | Relatively High |
| Heat Wave | Relatively High |
| Winter Weather | Very High |
| Lightning | Relatively High |
| Ice Storm | Relatively High |
| Drought | Relatively Low |
| Cold Wave | Relatively High |
| Landslide | Very Low |
| Coastal Flood | Relatively Moderate |
| 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 | — | — | 100 km |
| 1840 | PHILADELPHIA, PENNSYLVANIA | Earthquake | — | — | 16 km |
Source: NOAA/NCEI Historical Tsunami Database. Sorted by wave height.
Monthly Weather
| Month | Avg Temperature | Precipitation | Summary |
|---|---|---|---|
| January | 35°F (2°C) | 3.7 in | |
| February | 33°F (1°C) | 2.9 in | Coldest, Driest |
| March | 42°F (5°C) | 3.9 in | |
| April | 51°F (11°C) | 3.8 in | |
| May | 62°F (16°C) | 4.3 in | |
| June | 70°F (21°C) | 3.8 in | |
| July | 80°F (26°C) | 4.6 in | Warmest, Wettest |
| August | 74°F (23°C) | 4.1 in | |
| September | 67°F (19°C) | 4.2 in | |
| October | 55°F (13°C) | 3.2 in | |
| November | 46°F (8°C) | 3.7 in | |
| December | 36°F (2°C) | 3.6 in |
Chester has a seasonal temperature swing of 46°F / from 33°F in February to 80°F in July. Total annual precipitation is 45.7 inches, with July being the wettest month (4.6") and February the driest (2.9").