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Penns Grove, NJ
Full City Profile · New Jersey · Salem County County
2.3
/5.0
C
Fair
4,860
Population
5,461/sq mi density
$43,889
Median Income
$18,364 per capita
$170,100
Home Value
$195,301 Zillow
$1,031
Median Rent
34.6% income on rent
57°F
Avg Temperature
293 sunny days/yr
1,075
Violent Crime/100K
3,245 property/100K
C
Overall
2.3 / 5.0
Fair overall score based on economy, affordability, safety and education
D
Economy
1.7 / 5.0
$43,889 median income, 8.7% unemployment
A
Affordability
4.5 / 5.0
$170,100 home value, $1,031/mo rent
F
Safety
1.0 / 5.0
1,075 violent crimes/100K (183% above avg)
C
Education
2.2 / 5.0
14.6% bachelor's degree or higher
Penns Grove 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 39.
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 | 7 ft (2 m) |
| Area | 0.9 sq mi (2.3 km²) |
| Population Density | 5,461/sq mi |
| Coordinates | 39.7277°N, 75.4690°W |
| Timezone | America/New_York |
| County | Salem County County |
| Nearest Airport | Philadelphia International (PHL) 16 miles away |
Precipitation & Snow
Air Quality
| AQI Median | 39.0 |
| Rating | Good |
Natural Hazard Risk
| Overall Risk | Relatively Low |
| Risk Score | 76.5 / 100 |
| Social Vulnerability | 27.4 / 100 |
| Community Resilience | 89.5 / 100 |
Hazard Breakdown
| Tornado | Relatively Low |
| Hurricane | Relatively Low |
| Earthquake | Relatively Low |
| Wildfire | Relatively Low |
| Flood | Relatively Low |
| Hail | Relatively Low |
| Strong Wind | Relatively High |
| Heat Wave | Relatively Low |
| Winter Weather | Relatively Moderate |
| Lightning | Relatively Low |
| Ice Storm | Relatively High |
| Drought | Relatively Moderate |
| Cold Wave | Relatively Low |
| Landslide | Very Low |
| Coastal Flood | Very High |
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 | — | — | 116 km |
| 1840 | PHILADELPHIA, PENNSYLVANIA | Earthquake | — | — | 24 km |
Source: NOAA/NCEI Historical Tsunami Database. Sorted by wave height.
Monthly Weather
| Month | Avg Temperature | Precipitation | Summary |
|---|---|---|---|
| January | 35°F (2°C) | 3.6 in | |
| February | 34°F (1°C) | 2.9 in | Coldest, Driest |
| March | 42°F (6°C) | 4.0 in | |
| April | 52°F (11°C) | 3.8 in | |
| May | 62°F (17°C) | 4.2 in | |
| June | 71°F (22°C) | 3.7 in | |
| July | 80°F (26°C) | 4.5 in | Warmest, Wettest |
| August | 75°F (24°C) | 4.0 in | |
| September | 68°F (20°C) | 4.1 in | |
| October | 57°F (14°C) | 3.2 in | |
| November | 47°F (8°C) | 3.5 in | |
| December | 37°F (3°C) | 3.6 in |
Penns Grove has a seasonal temperature swing of 45°F / from 34°F in February to 80°F in July. Total annual precipitation is 45.2 inches, with July being the wettest month (4.5") and February the driest (2.9").