Califon, NJ
Full City Profile · New Jersey · Hunterdon County County
4.9
/5.0
A+
Excellent
1,065
Population
1,109/sq mi density
$130,938
Median Income
$60,829 per capita
$416,900
Home Value
$763,230 Zillow
$1,438
Median Rent
42.8% income on rent
53°F
Avg Temperature
A+
Overall
4.9 / 5.0
Strong
A+
Economy
4.7 / 5.0
$130,938 median income, 3.7% unemployment
A+
Affordability
4.9 / 5.0
$416,900 home value, $1,438/mo rent
A+
Education
5.0 / 5.0
58.9% bachelor's degree or higher
Califon 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 53.5 inches. The area receives 29.6 inches of snow annually. Air quality is rated Good with a median AQI of 41.
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 | 478 ft (146 m) |
| Area | 1.0 sq mi (2.5 km²) |
| Population Density | 1,109/sq mi |
| Coordinates | 40.7195°N, 74.8369°W |
| Timezone | America/New_York |
| County | Hunterdon County County |
| Nearest Airport | Central Jersey Regional (JVI) 18 miles away |
Precipitation & Snow
Air Quality
| AQI Median | 41.0 |
| Rating | Good |
| Good Days % | 72.9% |
| Unhealthy Days | 0 |
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
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 | - | 147 km |
| 1895 | HIGH BRIDGE, NJ | Earthquake | - | - | 7 km |
| 1840 | PHILADELPHIA, PENNSYLVANIA | Earthquake | - | - | 107 km |
Source: NOAA/NCEI Historical Tsunami Database. Sorted by wave height.
Monthly Weather
| Month | Avg Temperature | Precipitation | Summary |
|---|---|---|---|
| January | 30°F (-1°C) | 4.1 in | Coldest |
| February | 33°F (0°C) | 3.0 in | Driest |
| March | 40°F (5°C) | 4.3 in | |
| April | 51°F (11°C) | 4.2 in | |
| May | 61°F (16°C) | 4.4 in | |
| June | 70°F (21°C) | 5.4 in | Wettest |
| July | 75°F (24°C) | 5.2 in | Warmest |
| August | 73°F (23°C) | 4.8 in | |
| September | 66°F (19°C) | 4.9 in | |
| October | 54°F (12°C) | 4.7 in | |
| November | 44°F (7°C) | 3.8 in | |
| December | 35°F (2°C) | 4.7 in |
Califon has a seasonal temperature swing of 45°F / from 30°F in January to 75°F in July. Total annual precipitation is 53.5 inches, with June being the wettest month (5.4") and February the driest (3.0").