Allendale, NJ
Full City Profile · New Jersey · Passaic County County
4.1
/5.0
A
Great
6,820
Population
2,200/sq mi density
$156,992
Median Income
$93,937 per capita
$764,600
Home Value
$1,126,248 Zillow
$2,648
Median Rent
34.5% income on rent
55°F
Avg Temperature
A
Overall
4.1 / 5.0
Strong
A+
Economy
4.9 / 5.0
$156,992 median income, 2.7% unemployment
B+
Affordability
3.9 / 5.0
$764,600 home value, $2,648/mo rent
C+
Safety
2.5 / 5.0
0 violent crimes/100K
A+
Education
5.0 / 5.0
72.0% bachelor's degree or higher
Allendale 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. Annual precipitation totals 47.2 inches. The area receives 29.8 inches of snow annually. Air quality is rated Good with a median AQI of 38.
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) |
Geography
| Elevation | 297 ft (91 m) |
| Area | 3.1 sq mi (8.1 km²) |
| Population Density | 2,200/sq mi |
| Coordinates | 41.0327°N, 74.1338°W |
| Timezone | America/New_York |
| County | Passaic County County |
| Nearest Airport | Laguardia (LGA) 22 miles away |
Precipitation & Snow
Air Quality
| AQI Median | 38.0 |
| Rating | Good |
| Good Days % | 73.5% |
| Unhealthy Days | 2 |
Air Pollutants (EPA 2023)
| Ozone (O₃) | 0.0410 ppm |
| PM2.5 (Fine Particles) | 8.2 μg/m³ |
Natural Hazard Risk
| Overall Risk | Relatively High |
| Risk Score | 95.8 / 100 |
| Social Vulnerability | 76.0 / 100 |
| Community Resilience | 38.4 / 100 |
Hazard Breakdown
| Tornado | Relatively Moderate |
| Hurricane | Relatively Moderate |
| Earthquake | Relatively Moderate |
| Wildfire | Very Low |
| Flood | Relatively High |
| Hail | Very Low |
| Strong Wind | Very High |
| Heat Wave | Relatively Moderate |
| Winter Weather | Very High |
| Lightning | Very High |
| Ice Storm | Relatively Moderate |
| Drought | Relatively Low |
| Cold Wave | Relatively High |
| Landslide | Relatively Low |
| Coastal Flood | Very Low |
| Avalanche | Very Low |
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 | - | 91 km |
| 1895 | HIGH BRIDGE, NJ | Earthquake | - | - | 75 km |
Source: NOAA/NCEI Historical Tsunami Database. Sorted by wave height.
Monthly Weather
| Month | Avg Temperature | Precipitation | Summary |
|---|---|---|---|
| January | 33°F (0°C) | 3.1 in | Coldest |
| February | 35°F (2°C) | 2.6 in | Driest |
| March | 42°F (6°C) | 3.9 in | |
| April | 53°F (12°C) | 4.0 in | |
| May | 63°F (17°C) | 3.9 in | |
| June | 73°F (23°C) | 4.2 in | |
| July | 78°F (26°C) | 4.8 in | Warmest |
| August | 76°F (25°C) | 4.9 in | Wettest |
| September | 69°F (21°C) | 3.7 in | |
| October | 57°F (14°C) | 4.5 in | |
| November | 47°F (8°C) | 3.6 in | |
| December | 38°F (3°C) | 4.1 in |
Allendale has a seasonal temperature swing of 45°F / from 33°F in January to 78°F in July. Total annual precipitation is 47.2 inches, with August being the wettest month (4.9") and February the driest (2.6").