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Riverdale, NJ
Full City Profile · New Jersey · Bergen County County
3.8
/5.0
B+
Good
4,084
Population
2,012/sq mi density
$96,667
Median Income
$55,102 per capita
$384,500
Home Value
$475,549 Zillow
$2,351
Median Rent
31.9% income on rent
52°F
Avg Temperature
275 sunny days/yr
47
Violent Crime/100K
2,256 property/100K
B+
Overall
3.8 / 5.0
Good overall score based on economy, affordability, safety and education
A+
Economy
4.9 / 5.0
$96,667 median income, 0.9% unemployment
A
Affordability
4.4 / 5.0
$384,500 home value, $2,351/mo rent
F
Safety
1.0 / 5.0
47 violent crimes/100K
A+
Education
4.8 / 5.0
47.7% bachelor's degree or higher
Riverdale experiences four distinct seasons with an average annual temperature of 52°F (11°C). Winters average 29°F in January while summers reach 75°F in July. The area gets 275 sunny days per year. Annual precipitation totals 49.2 inches. Air quality is rated Good with a median AQI of 39.
Temperature
29°F Jan (-2°C)
75°F Jul (24°C)
| Annual Average | 51.8°F |
| 4% below US avg | |
| January Average | 29°F (-2°C) |
| July Average | 75°F (24°C) |
| Sunny Days | 275 days/yr |
Geography
| Elevation | 302 ft (92 m) |
| Area | 2.1 sq mi (5.4 km²) |
| Population Density | 2,012/sq mi |
| Coordinates | 40.9959°N, 74.3145°W |
| Timezone | America/New_York |
| County | Bergen County County |
| Nearest Airport | Newark Liberty International (EWR) 22 miles away |
Precipitation & Snow
Air Quality
| AQI Median | 39.0 |
| Rating | Good |
Air Pollutants (EPA 2023)
| Ozone (O₃) | 0.0417 ppm |
| NO₂ (Nitrogen Dioxide) | 24.5 ppb |
| CO (Carbon Monoxide) | 0.35 ppm |
| PM2.5 (Fine Particles) | 10.0 μg/m³ |
Natural Hazard Risk
| Overall Risk | Relatively High |
| Risk Score | 97.8 / 100 |
| Social Vulnerability | 34.0 / 100 |
| Community Resilience | 76.1 / 100 |
Hazard Breakdown
| Tornado | Relatively High |
| Hurricane | Relatively Moderate |
| Earthquake | Relatively Moderate |
| Wildfire | Very Low |
| Flood | Relatively High |
| Hail | Very Low |
| Strong Wind | Very High |
| Heat Wave | Relatively High |
| Winter Weather | Very High |
| Lightning | Relatively High |
| Ice Storm | Relatively Moderate |
| Drought | Relatively Low |
| Cold Wave | Relatively High |
| Landslide | Very Low |
| Coastal Flood | Very High |
Source: FEMA National Risk Index v1.20 (Dec 2025)
Tsunami History
2 tsunamis recorded within 500 km. Highest wave on record: 0.3 m (1 ft).
| Year | Location | Cause | Max Wave | Deaths | Distance |
| 1964 | LONG ISLAND, NY | Meteorological | 0.3 m | — | 104 km |
| 1895 | HIGH BRIDGE, NJ | Earthquake | — | — | 60 km |
Source: NOAA/NCEI Historical Tsunami Database. Sorted by wave height.
Monthly Weather
| Month | Avg Temperature | Precipitation | Summary |
|---|---|---|---|
| January | 29°F (-2°C) | 3.9 in | Coldest |
| February | 31°F (-1°C) | 3.1 in | Driest |
| March | 40°F (4°C) | 4.2 in | |
| April | 50°F (10°C) | 4.3 in | |
| May | 60°F (16°C) | 4.7 in | Wettest |
| June | 69°F (21°C) | 4.2 in | |
| July | 75°F (24°C) | 4.7 in | Warmest |
| August | 72°F (22°C) | 4.3 in | |
| September | 65°F (18°C) | 4.7 in | |
| October | 54°F (12°C) | 4.0 in | |
| November | 44°F (7°C) | 4.3 in | |
| December | 34°F (1°C) | 3.8 in |
Riverdale has a seasonal temperature swing of 46°F / from 29°F in January to 75°F in July. Total annual precipitation is 50.1 inches, with May being the wettest month (4.7") and February the driest (3.1").