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Juliustown, NJ
Full City Profile · New Jersey · Mercer County County
2.6
/5.0
C+
Fair
207
Population
174/sq mi density
$455,600
Home Value
$306,260 Zillow
53°F
Avg Temperature
275 sunny days/yr
C+
Overall
2.6 / 5.0
Fair overall score based on economy, affordability, safety and education
C+
Safety
2.5 / 5.0
0 violent crimes/100K
C+
Education
2.6 / 5.0
20.2% bachelor's degree or higher
Juliustown experiences four distinct seasons with an average annual temperature of 53°F (12°C). Winters average 31°F in January while summers reach 76°F in July. The area gets 275 sunny days per year. Annual precipitation totals 45.9 inches. The area receives 24.8 inches of snow annually. Air quality is rated Good with a median AQI of 39.
Temperature
31°F Jan (-1°C)
76°F Jul (24°C)
| Annual Average | 53.1°F |
| 2% below US avg | |
| January Average | 31°F (-1°C) |
| July Average | 76°F (24°C) |
| Sunny Days | 275 days/yr |
Geography
| Elevation | 113 ft (34 m) |
| Area | 1.2 sq mi (3.1 km²) |
| Population Density | 174/sq mi |
| Coordinates | 40.0121°N, 74.6715°W |
| Timezone | America/New_York |
| County | Mercer County County |
| Nearest Airport | South Jersey Regional (LLY) 10 miles away |
Precipitation & Snow
Air Quality
| AQI Median | 39.0 |
| Rating | Good |
Air Pollutants (EPA 2023)
| Ozone (O₃) | 0.0450 ppm |
| PM2.5 (Fine Particles) | 9.6 μg/m³ |
Natural Hazard Risk
| Overall Risk | Relatively High |
| Risk Score | 95.4 / 100 |
| Social Vulnerability | 46.9 / 100 |
| Community Resilience | 70.2 / 100 |
Hazard Breakdown
| Tornado | Relatively Moderate |
| Hurricane | Relatively High |
| Earthquake | Relatively Moderate |
| Wildfire | Relatively Low |
| Flood | Relatively High |
| Hail | Very Low |
| Strong Wind | Very High |
| Heat Wave | Relatively Moderate |
| Winter Weather | Very High |
| Lightning | Relatively High |
| Ice Storm | Very High |
| Drought | Relatively Low |
| Cold Wave | Relatively Moderate |
| Landslide | Very Low |
| Coastal Flood | Relatively 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 | — | — | 75 km |
| 1840 | PHILADELPHIA, PENNSYLVANIA | Earthquake | — | — | 51 km |
Source: NOAA/NCEI Historical Tsunami Database. Sorted by wave height.
Monthly Weather
| Month | Avg Temperature | Precipitation | Summary |
|---|---|---|---|
| January | 31°F (-1°C) | 3.7 in | Coldest |
| February | 34°F (1°C) | 2.9 in | Driest |
| March | 42°F (5°C) | 4.1 in | |
| April | 51°F (11°C) | 3.9 in | |
| May | 62°F (16°C) | 4.2 in | |
| June | 71°F (21°C) | 3.8 in | |
| July | 76°F (24°C) | 4.6 in | Warmest |
| August | 74°F (23°C) | 4.7 in | Wettest |
| September | 67°F (19°C) | 3.9 in | |
| October | 56°F (13°C) | 3.4 in | |
| November | 46°F (8°C) | 3.7 in | |
| December | 36°F (2°C) | 3.7 in |
Juliustown has a seasonal temperature swing of 45°F / from 31°F in January to 76°F in July. Total annual precipitation is 46.4 inches, with August being the wettest month (4.7") and February the driest (2.9").