All Countries
Riverhead, NY
Full City Profile · New York · Suffolk County County
2.8
/5.0
C+
Fair
15,073
Population
999/sq mi density
$83,521
Median Income
$37,481 per capita
$449,000
Home Value
$607,684 Zillow
$2,208
Median Rent
36.2% income on rent
54°F
Avg Temperature
275 sunny days/yr
22
Violent Crime/100K
356 property/100K
C+
Overall
2.8 / 5.0
Fair overall score based on economy, affordability, safety and education
A
Economy
4.3 / 5.0
$83,521 median income, 4.1% unemployment
B+
Affordability
3.6 / 5.0
$449,000 home value, $2,208/mo rent
F
Safety
1.0 / 5.0
22 violent crimes/100K
C
Education
2.4 / 5.0
18.0% bachelor's degree or higher
Riverhead experiences four distinct seasons with an average annual temperature of 54°F (12°C). Winters average 33°F in January while summers reach 75°F in July. The area gets 275 sunny days per year. Annual precipitation totals 47.2 inches. Air quality is rated Good with a median AQI of 36.
Temperature
33°F Jan (0°C)
75°F Jul (24°C)
| Annual Average | 54.1°F |
| 0% below US avg | |
| January Average | 33°F (0°C) |
| July Average | 75°F (24°C) |
| Sunny Days | 275 days/yr |
Geography
| Elevation | 58 ft (18 m) |
| Area | 15.1 sq mi (39.1 km²) |
| Population Density | 999/sq mi |
| Coordinates | 40.9513°N, 72.6761°W |
| Timezone | America/New_York |
| County | Suffolk County County |
| Nearest Airport | John F Kennedy International (JFK) 62 miles away |
Precipitation & Snow
Air Quality
| AQI Median | 36.0 |
| Rating | Good |
Air Pollutants (EPA 2023)
| Ozone (O₃) | 0.0454 ppm |
| NO₂ (Nitrogen Dioxide) | 5.8 ppb |
| CO (Carbon Monoxide) | 0.19 ppm |
| PM2.5 (Fine Particles) | 7.6 μg/m³ |
Natural Hazard Risk
| Overall Risk | Relatively High |
| Risk Score | 97.3 / 100 |
| Social Vulnerability | 21.6 / 100 |
| Community Resilience | 94.1 / 100 |
Hazard Breakdown
| Tornado | Relatively Moderate |
| Hurricane | Relatively High |
| Earthquake | Relatively Moderate |
| Wildfire | Relatively Low |
| Flood | Relatively High |
| Hail | Relatively Low |
| Strong Wind | Relatively High |
| Heat Wave | Relatively Moderate |
| Winter Weather | Very High |
| Lightning | Very High |
| Ice Storm | Very High |
| Drought | Very Low |
| Cold Wave | Relatively High |
| Landslide | Relatively Low |
| Coastal Flood | Very High |
Source: FEMA National Risk Index v1.20 (Dec 2025)
Tsunami History
1 tsunami 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 | — | 39 km |
Source: NOAA/NCEI Historical Tsunami Database. Sorted by wave height.
Monthly Weather
| Month | Avg Temperature | Precipitation | Summary |
|---|---|---|---|
| January | 33°F (0°C) | 3.8 in | |
| February | 32°F (-0°C) | 3.5 in | Coldest |
| March | 39°F (4°C) | 4.1 in | |
| April | 48°F (9°C) | 3.9 in | |
| May | 58°F (15°C) | 3.6 in | |
| June | 67°F (20°C) | 3.0 in | Driest |
| July | 75°F (24°C) | 3.2 in | Warmest |
| August | 72°F (22°C) | 4.0 in | |
| September | 65°F (18°C) | 3.3 in | |
| October | 54°F (12°C) | 3.4 in | |
| November | 45°F (7°C) | 4.1 in | Wettest |
| December | 36°F (2°C) | 4.1 in |
Riverhead has a seasonal temperature swing of 44°F / from 32°F in February to 75°F in July. Total annual precipitation is 44.1 inches, with November being the wettest month (4.1") and June the driest (3.0").