Somerville, NJ
Full City Profile · New Jersey · Somerset County County
3.8
/5.0
B+
Good
12,958
Population
5,538/sq mi density
$103,869
Median Income
$54,478 per capita
$403,600
Home Value
$552,174 Zillow
$1,748
Median Rent
25.8% income on rent
53°F
Avg Temperature
79
Violent Crime/100K
747 property/100K
B+
Overall
3.8 / 5.0
Good overall score based on economy, affordability, safety and education
A+
Economy
4.7 / 5.0
$103,869 median income, 4.0% unemployment
A
Affordability
4.5 / 5.0
$403,600 home value, $1,748/mo rent
F
Safety
1.0 / 5.0
79 violent crimes/100K
A+
Education
5.0 / 5.0
53.5% bachelor's degree or higher
Somerville 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 | 45 ft (14 m) |
| Area | 2.4 sq mi (6.1 km²) |
| Population Density | 5,538/sq mi |
| Coordinates | 40.5697°N, 74.6077°W |
| Timezone | America/New_York |
| County | Somerset County County |
| Nearest Airport | Central Jersey Regional (JVI) 3 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 | - | 130 km |
| 1895 | HIGH BRIDGE, NJ | Earthquake | - | - | 26 km |
| 1840 | PHILADELPHIA, PENNSYLVANIA | Earthquake | - | - | 99 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 |
Somerville 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").