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Mountain Lake, NJ
Full City Profile · New Jersey · Hunterdon County County
3.4
/5.0
B
Good
566
Population
501/sq mi density
$99,063
Median Income
$56,639 per capita
$329,900
Home Value
$468,153 Zillow
$1,795
Median Rent
19.6% income on rent
52°F
Avg Temperature
271 sunny days/yr
38
Violent Crime/100K
801 property/100K
B
Overall
3.4 / 5.0
Good overall score based on economy, affordability, safety and education
A+
Economy
5.0 / 5.0
$99,063 median income, 1.1% unemployment
A+
Affordability
4.8 / 5.0
$329,900 home value, $1,795/mo rent
F
Safety
1.0 / 5.0
38 violent crimes/100K
C+
Education
2.8 / 5.0
23.0% bachelor's degree or higher
Mountain Lake 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 271 sunny days per year. Annual precipitation totals 50.9 inches. The area receives 27.1 inches of snow annually. Air quality is rated Good with a median AQI of 39.
Temperature
29°F Jan (-2°C)
75°F Jul (24°C)
| Annual Average | 52.1°F |
| 4% below US avg | |
| January Average | 29°F (-2°C) |
| July Average | 75°F (24°C) |
| Sunny Days | 271 days/yr |
Geography
| Elevation | 410 ft (125 m) |
| Area | 1.3 sq mi (3.4 km²) |
| Population Density | 501/sq mi |
| Coordinates | 40.8598°N, 74.9876°W |
| Timezone | America/New_York |
| County | Hunterdon County County |
| Nearest Airport | Lehigh Valley International (ABE) 28 miles away |
Precipitation & Snow
Air Quality
| AQI Median | 39.0 |
| Rating | Good |
Air Pollutants (EPA 2023)
| Ozone (O₃) | 0.0452 ppm |
| PM2.5 (Fine Particles) | 8.8 μg/m³ |
Natural Hazard Risk
| Overall Risk | Relatively Low |
| Risk Score | 78.7 / 100 |
| Social Vulnerability | 10.6 / 100 |
| Community Resilience | 95.1 / 100 |
Hazard Breakdown
| Tornado | Relatively Low |
| Hurricane | Relatively Low |
| Earthquake | Relatively Low |
| Wildfire | Very Low |
| Flood | Relatively Moderate |
| Hail | Very Low |
| Strong Wind | Relatively High |
| Heat Wave | Relatively Low |
| Winter Weather | Relatively Moderate |
| Lightning | Relatively Moderate |
| Ice Storm | Relatively High |
| Drought | Relatively Moderate |
| Cold Wave | Relatively Low |
| Landslide | Very Low |
Source: FEMA National Risk Index v1.20 (Dec 2025)
Tsunami History
2 tsunamis recorded within 500 km.
| Year | Location | Cause | Max Wave | Deaths | Distance |
| 1895 | HIGH BRIDGE, NJ | Earthquake | — | — | 23 km |
| 1840 | PHILADELPHIA, PENNSYLVANIA | Earthquake | — | — | 119 km |
Source: NOAA/NCEI Historical Tsunami Database. Sorted by wave height.
Monthly Weather
| Month | Avg Temperature | Precipitation | Summary |
|---|---|---|---|
| January | 29°F (-2°C) | 3.5 in | |
| February | 28°F (-2°C) | 3.0 in | Coldest, Driest |
| March | 37°F (3°C) | 3.7 in | |
| April | 47°F (9°C) | 4.1 in | |
| May | 58°F (14°C) | 4.5 in | |
| June | 66°F (19°C) | 4.3 in | |
| July | 75°F (24°C) | 4.6 in | Warmest, Wettest |
| August | 70°F (21°C) | 4.4 in | |
| September | 63°F (17°C) | 4.3 in | |
| October | 51°F (11°C) | 3.7 in | |
| November | 42°F (5°C) | 4.1 in | |
| December | 31°F (-0°C) | 3.6 in |
Mountain Lake has a seasonal temperature swing of 47°F / from 28°F in February to 75°F in July. Total annual precipitation is 47.6 inches, with July being the wettest month (4.6") and February the driest (3.0").