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Mount Royal, NJ
Full City Profile · New Jersey · Gloucester County County
2.4
/5.0
C
Fair
1,077
Population
1,958/sq mi density
$417,400
Home Value
$443,883 Zillow
56°F
Avg Temperature
293 sunny days/yr
332
Violent Crime/100K
3,773 property/100K
C
Overall
2.4 / 5.0
Fair overall score based on economy, affordability, safety and education
F
Safety
1.0 / 5.0
332 violent crimes/100K
B+
Education
3.8 / 5.0
34.8% bachelor's degree or higher
Mount Royal enjoys a temperate climate with an average annual temperature of 56°F (13°C). Winters average 34°F in January while summers reach 79°F in July. The area gets 293 sunny days per year. Annual precipitation totals 44.1 inches. The area receives 23.1 inches of snow annually. Air quality is rated Good with a median AQI of 39.
Temperature
34°F Jan (1°C)
79°F Jul (26°C)
| Annual Average | 56.3°F |
| 4% above US avg | |
| January Average | 34°F (1°C) |
| July Average | 79°F (26°C) |
| Sunny Days | 293 days/yr |
Geography
| Elevation | 41 ft (12 m) |
| Area | 0.6 sq mi (1.4 km²) |
| Population Density | 1,958/sq mi |
| Coordinates | 39.8100°N, 75.2147°W |
| Timezone | America/New_York |
| County | Gloucester County County |
| Nearest Airport | Philadelphia International (PHL) 5 miles away |
Precipitation & Snow
Air Quality
| AQI Median | 39.0 |
| Rating | Good |
Air Pollutants (EPA 2023)
| Ozone (O₃) | 0.0470 ppm |
| PM2.5 (Fine Particles) | 7.5 μg/m³ |
Natural Hazard Risk
| Overall Risk | Relatively Moderate |
| Risk Score | 86.6 / 100 |
| Social Vulnerability | 16.0 / 100 |
| Community Resilience | 85.7 / 100 |
Hazard Breakdown
| Tornado | Relatively Moderate |
| Hurricane | Relatively Moderate |
| Earthquake | Relatively Low |
| Wildfire | Relatively Low |
| Flood | Relatively Moderate |
| Hail | Relatively Low |
| Strong Wind | Relatively High |
| Heat Wave | Relatively Moderate |
| Winter Weather | Very High |
| Lightning | Relatively High |
| Ice Storm | Relatively High |
| Drought | Relatively Moderate |
| Cold Wave | Relatively Moderate |
| Landslide | Very Low |
| Coastal Flood | Relatively 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 | — | — | 99 km |
| 1840 | PHILADELPHIA, PENNSYLVANIA | Earthquake | — | — | 2 km |
Source: NOAA/NCEI Historical Tsunami Database. Sorted by wave height.
Monthly Weather
| Month | Avg Temperature | Precipitation | Summary |
|---|---|---|---|
| January | 34°F (1°C) | 3.6 in | Coldest |
| February | 34°F (1°C) | 2.9 in | Driest |
| March | 42°F (6°C) | 4.0 in | |
| April | 52°F (11°C) | 3.7 in | |
| May | 62°F (17°C) | 4.1 in | |
| June | 71°F (22°C) | 3.5 in | |
| July | 79°F (26°C) | 4.4 in | Warmest, Wettest |
| August | 74°F (24°C) | 4.1 in | |
| September | 67°F (20°C) | 3.9 in | |
| October | 56°F (13°C) | 3.1 in | |
| November | 46°F (8°C) | 3.4 in | |
| December | 37°F (3°C) | 3.5 in |
Mount Royal has a seasonal temperature swing of 45°F / from 34°F in January to 79°F in July. Total annual precipitation is 44.3 inches, with July being the wettest month (4.4") and February the driest (2.9").