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Stewartsville, NJ
Full City Profile · New Jersey · Northampton County County
3.9
/5.0
B+
Good
661
Population
612/sq mi density
$155,588
Median Income
$65,100 per capita
$439,500
Home Value
$484,683 Zillow
52°F
Avg Temperature
271 sunny days/yr
B+
Overall
3.9 / 5.0
Good overall score based on economy, affordability, safety and education
A+
Economy
4.5 / 5.0
$155,588 median income, 1.5% unemployment
A+
Affordability
5.0 / 5.0
$439,500 home value, /mo rent
C+
Safety
2.5 / 5.0
0 violent crimes/100K
B+
Education
3.8 / 5.0
34.7% bachelor's degree or higher
Stewartsville experiences four distinct seasons with an average annual temperature of 52°F (11°C). Winters average 30°F in January while summers reach 75°F in July. The area gets 271 sunny days per year. Annual precipitation totals 51.0 inches. Air quality is rated Good with a median AQI of 39.
Temperature
30°F Jan (-1°C)
75°F Jul (24°C)
| Annual Average | 52.1°F |
| 4% below US avg | |
| January Average | 30°F (-1°C) |
| July Average | 75°F (24°C) |
| Sunny Days | 271 days/yr |
Geography
| Elevation | 334 ft (102 m) |
| Area | 0.1 sq mi (0.3 km²) |
| Population Density | 612/sq mi |
| Coordinates | 40.6889°N, 75.1022°W |
| Timezone | America/New_York |
| County | Northampton County County |
| Nearest Airport | Lehigh Valley International (ABE) 18 miles away |
Precipitation & Snow
Air Quality
| AQI Median | 39.0 |
| Rating | Good |
Air Pollutants (EPA 2023)
| Ozone (O₃) | 0.0445 ppm |
| NO₂ (Nitrogen Dioxide) | 13.3 ppb |
| SO₂ (Sulfur Dioxide) | 0.77 ppb |
| PM2.5 (Fine Particles) | 9.5 μg/m³ |
Natural Hazard Risk
| Overall Risk | Relatively Moderate |
| Risk Score | 90.0 / 100 |
| Social Vulnerability | 30.6 / 100 |
| Community Resilience | 73.7 / 100 |
Hazard Breakdown
| Tornado | Relatively Moderate |
| Hurricane | Relatively Moderate |
| Earthquake | Relatively Low |
| Wildfire | Very Low |
| Flood | Relatively High |
| Hail | Very Low |
| Strong Wind | Relatively Moderate |
| Heat Wave | Relatively Moderate |
| Winter Weather | Relatively High |
| Lightning | Relatively High |
| Ice Storm | Relatively Moderate |
| Drought | Relatively Low |
| Cold Wave | Relatively Moderate |
| Landslide | Relatively Low |
| Avalanche | 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 | — | — | 19 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) | 3.6 in | |
| February | 29°F (-2°C) | 3.0 in | Coldest, Driest |
| March | 38°F (3°C) | 3.7 in | |
| April | 48°F (9°C) | 4.0 in | |
| May | 59°F (15°C) | 4.6 in | Wettest |
| June | 67°F (19°C) | 4.2 in | |
| July | 75°F (24°C) | 4.6 in | Warmest |
| August | 71°F (21°C) | 4.3 in | |
| September | 64°F (18°C) | 4.3 in | |
| October | 52°F (11°C) | 3.7 in | |
| November | 42°F (6°C) | 4.0 in | |
| December | 32°F (0°C) | 3.6 in |
Stewartsville has a seasonal temperature swing of 46°F / from 29°F in February to 75°F in July. Total annual precipitation is 47.5 inches, with May being the wettest month (4.6") and February the driest (3.0").