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Stony Brook, NY
Full City Profile · New York · Nassau County County
3.9
/5.0
B+
Good
12,827
Population
2,204/sq mi density
$162,054
Median Income
$72,519 per capita
$587,300
Home Value
$745,555 Zillow
$2,643
Median Rent
38.7% income on rent
53°F
Avg Temperature
282 sunny days/yr
22
Violent Crime/100K
356 property/100K
B+
Overall
3.9 / 5.0
Good overall score based on economy, affordability, safety and education
A+
Economy
4.9 / 5.0
$162,054 median income, 2.8% unemployment
A+
Affordability
4.6 / 5.0
$587,300 home value, $2,643/mo rent
F
Safety
1.0 / 5.0
22 violent crimes/100K
A+
Education
5.0 / 5.0
68.1% bachelor's degree or higher
Stony Brook experiences four distinct seasons with an average annual temperature of 53°F (12°C). Winters average 33°F in January while summers reach 74°F in July. The area gets 282 sunny days per year. Air quality is rated Good with a median AQI of 36.
Temperature
33°F Jan (0°C)
74°F Jul (24°C)
| Annual Average | 53.4°F |
| 1% below US avg | |
| January Average | 33°F (0°C) |
| July Average | 74°F (24°C) |
| Sunny Days | 282 days/yr |
Geography
| Elevation | 160 ft (49 m) |
| Area | 5.8 sq mi (15.1 km²) |
| Population Density | 2,204/sq mi |
| Coordinates | 40.9078°N, 73.1275°W |
| Timezone | America/New_York |
| County | Nassau County County |
| Nearest Airport | John F Kennedy International (JFK) 39 miles away |
Precipitation & Snow
Air Quality
| AQI Median | 36.0 |
| Rating | Good |
Natural Hazard Risk
| Overall Risk | Relatively High |
| Risk Score | 97.1 / 100 |
| Social Vulnerability | 25.9 / 100 |
| Community Resilience | 97.0 / 100 |
Hazard Breakdown
| Tornado | Relatively Moderate |
| Hurricane | Relatively High |
| Earthquake | Relatively Moderate |
| Wildfire | Very Low |
| Flood | Relatively High |
| Hail | Very 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 | — | 12 km |
Source: NOAA/NCEI Historical Tsunami Database. Sorted by wave height.
Monthly Weather
| Month | Avg Temperature | Precipitation | Summary |
|---|---|---|---|
| January | 33°F (0°C) | 3.7 in | |
| February | 32°F (0°C) | 3.0 in | Coldest, Driest |
| March | 40°F (4°C) | 4.0 in | Wettest |
| April | 49°F (9°C) | 4.0 in | |
| May | 59°F (15°C) | 3.7 in | |
| June | 68°F (20°C) | 3.3 in | |
| July | 74°F (24°C) | 3.2 in | Warmest |
| August | 72°F (22°C) | 3.8 in | |
| September | 65°F (19°C) | 3.4 in | |
| October | 55°F (13°C) | 3.4 in | |
| November | 46°F (8°C) | 3.9 in | |
| December | 36°F (2°C) | 3.7 in |
Stony Brook has a seasonal temperature swing of 42°F / from 32°F in February to 74°F in July. Total annual precipitation is 43.0 inches, with March being the wettest month (4.0") and February the driest (3.0").