Flanders, NJ
Full City Profile · New Jersey · Morris County County
4.9
/5.0
A+
Excellent
8,949
Population
1,204/sq mi density
$149,769
Median Income
$66,489 per capita
$492,600
Home Value
$661,568 Zillow
$1,872
Median Rent
25.0% income on rent
51°F
Avg Temperature
A+
Overall
4.9 / 5.0
Strong
A+
Economy
4.8 / 5.0
$149,769 median income, 3.1% unemployment
A+
Affordability
4.8 / 5.0
$492,600 home value, $1,872/mo rent
A+
Education
5.0 / 5.0
50.1% bachelor's degree or higher
Flanders experiences four distinct seasons with an average annual temperature of 51°F (11°C). Winters average 27°F in January while summers reach 73°F in July. Annual precipitation totals 48.8 inches. The area receives 29.6 inches of snow annually. Air quality is rated Good with a median AQI of 37.
Temperature
27°F Jan (-3°C)
73°F Jul (23°C)
| Annual Average | 50.5°F |
| 6% below US avg | |
| January Average | 27°F (-3°C) |
| July Average | 73°F (23°C) |
Geography
| Elevation | 868 ft (265 m) |
| Area | 7.5 sq mi (19.3 km²) |
| Population Density | 1,204/sq mi |
| Coordinates | 40.8439°N, 74.7098°W |
| Timezone | America/New_York |
| County | Morris County County |
| Nearest Airport | Central Jersey Regional (JVI) 23 miles away |
Precipitation & Snow
Air Quality
| AQI Median | 37.0 |
| Rating | Good |
| Good Days % | 83.3% |
| Unhealthy Days | 2 |
Air Pollutants (EPA 2023)
| Ozone (O₃) | 0.0448 ppm |
| NO₂ (Nitrogen Dioxide) | 5.1 ppb |
| SO₂ (Sulfur Dioxide) | 0.82 ppb |
| PM2.5 (Fine Particles) | 6.7 μg/m³ |
Natural Hazard Risk
| Overall Risk | Relatively Moderate |
| Risk Score | 92.9 / 100 |
| Social Vulnerability | 10.6 / 100 |
| Community Resilience | 89.5 / 100 |
Hazard Breakdown
| Tornado | Relatively Moderate |
| Hurricane | Relatively Moderate |
| Earthquake | Relatively Low |
| Wildfire | Very Low |
| Flood | Relatively High |
| Hail | Very Low |
| Strong Wind | Relatively High |
| Heat Wave | Relatively Moderate |
| Winter Weather | Very High |
| Lightning | Relatively High |
| Ice Storm | Relatively Low |
| Drought | Relatively Moderate |
| Cold Wave | Relatively High |
| Landslide | Relatively Low |
| Avalanche | Very Low |
Source: FEMA National Risk Index v1.20 (Dec 2025)
Tsunami History
3 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 | - | 136 km |
| 1895 | HIGH BRIDGE, NJ | Earthquake | - | - | 25 km |
| 1840 | PHILADELPHIA, PENNSYLVANIA | Earthquake | - | - | 123 km |
Source: NOAA/NCEI Historical Tsunami Database. Sorted by wave height.
Monthly Weather
| Month | Avg Temperature | Precipitation | Summary |
|---|---|---|---|
| January | 27°F (-3°C) | 3.3 in | Coldest |
| February | 29°F (-1°C) | 2.8 in | Driest |
| March | 38°F (3°C) | 4.1 in | |
| April | 50°F (10°C) | 3.8 in | |
| May | 60°F (15°C) | 3.8 in | |
| June | 68°F (20°C) | 4.5 in | |
| July | 73°F (23°C) | 5.1 in | Warmest, Wettest |
| August | 71°F (22°C) | 4.9 in | |
| September | 63°F (17°C) | 4.3 in | |
| October | 52°F (11°C) | 4.6 in | |
| November | 42°F (6°C) | 3.4 in | |
| December | 33°F (0°C) | 4.2 in |
Flanders has a seasonal temperature swing of 45°F / from 27°F in January to 73°F in July. Total annual precipitation is 48.8 inches, with July being the wettest month (5.1") and February the driest (2.8").