Flagtown, NJ
Full City Profile · New Jersey · Somerset County County
4.9
/5.0
A+
Excellent
985
Population
576/sq mi density
$220,677
Median Income
$81,984 per capita
$650,200
Home Value
$532,498 Zillow
53°F
Avg Temperature
A+
Overall
4.9 / 5.0
Strong
A+
Economy
4.7 / 5.0
$220,677 median income, 4.0% unemployment
A+
Affordability
5.0 / 5.0
$650,200 home value, /mo rent
A+
Education
5.0 / 5.0
65.2% bachelor's degree or higher
Flagtown experiences four distinct seasons with an average annual temperature of 53°F (12°C). Winters average 30°F in January while summers reach 75°F in July. Annual precipitation totals 45.5 inches. The area receives 21.0 inches of snow annually.
Temperature
30°F Jan (-1°C)
75°F Jul (24°C)
| Annual Average | 52.5°F |
| 3% below US avg | |
| January Average | 30°F (-1°C) |
| July Average | 75°F (24°C) |
Geography
| Elevation | 123 ft (37 m) |
| Area | 1.7 sq mi (4.5 km²) |
| Population Density | 576/sq mi |
| Coordinates | 40.5225°N, 74.6910°W |
| Timezone | America/New_York |
| County | Somerset County County |
| Nearest Airport | Central Jersey Regional (JVI) 5 miles away |
Precipitation & Snow
Air Quality
Natural Hazard Risk
| Overall Risk | Relatively Moderate |
| Risk Score | 90.9 / 100 |
| Social Vulnerability | 10.6 / 100 |
| Community Resilience | 93.3 / 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 | Relatively High |
| Lightning | Relatively High |
| Ice Storm | Relatively High |
| Drought | Relatively Low |
| Cold Wave | Relatively Moderate |
| Landslide | Very Low |
| Coastal Flood | 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 | - | 138 km |
| 1895 | HIGH BRIDGE, NJ | Earthquake | - | - | 23 km |
| 1840 | PHILADELPHIA, PENNSYLVANIA | Earthquake | - | - | 91 km |
Source: NOAA/NCEI Historical Tsunami Database. Sorted by wave height.
Monthly Weather
| Month | Avg Temperature | Precipitation | Summary |
|---|---|---|---|
| January | 30°F (-1°C) | 3.2 in | Coldest |
| February | 33°F (0°C) | 2.2 in | Driest |
| March | 40°F (5°C) | 3.9 in | |
| April | 51°F (11°C) | 3.6 in | |
| May | 61°F (16°C) | 3.5 in | |
| June | 70°F (21°C) | 4.2 in | |
| July | 75°F (24°C) | 4.9 in | Warmest |
| August | 73°F (23°C) | 5.2 in | Wettest |
| September | 66°F (19°C) | 3.8 in | |
| October | 54°F (12°C) | 3.7 in | |
| November | 44°F (7°C) | 3.4 in | |
| December | 35°F (2°C) | 3.9 in |
Flagtown has a seasonal temperature swing of 45°F / from 30°F in January to 75°F in July. Total annual precipitation is 45.5 inches, with August being the wettest month (5.2") and February the driest (2.2").