Middle Island, NY
Full City Profile · New York · Suffolk County County
4.2
/5.0
A
Great
11,086
Population
1,349/sq mi density
$89,702
Median Income
$44,163 per capita
$347,900
Home Value
$513,796 Zillow
$1,774
Median Rent
49.8% income on rent
52°F
Avg Temperature
A
Overall
4.2 / 5.0
Strong
A
Economy
4.4 / 5.0
$89,702 median income, 4.4% unemployment
A
Affordability
4.5 / 5.0
$347,900 home value, $1,774/mo rent
B+
Education
3.6 / 5.0
31.9% bachelor's degree or higher
Middle Island experiences four distinct seasons with an average annual temperature of 52°F (11°C). Winters average 32°F in January while summers reach 74°F in July. Annual precipitation totals 44.2 inches. The area receives 31.8 inches of snow annually. Air quality is rated Good with a median AQI of 38.
Temperature
32°F Jan (-0°C)
74°F Jul (23°C)
| Annual Average | 52.4°F |
| 3% below US avg | |
| January Average | 32°F (-0°C) |
| July Average | 74°F (23°C) |
Geography
| Elevation | 54 ft (16 m) |
| Area | 8.3 sq mi (21.4 km²) |
| Population Density | 1,349/sq mi |
| Coordinates | 40.8925°N, 72.9512°W |
| Timezone | America/New_York |
| County | Suffolk County County |
| Nearest Airport | John F Kennedy International (JFK) 47 miles away |
Precipitation & Snow
Air Quality
| AQI Median | 38.0 |
| Rating | Good |
| Good Days % | 79.5% |
| Unhealthy Days | 6 |
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 | - | 16 km |
Source: NOAA/NCEI Historical Tsunami Database. Sorted by wave height.
Monthly Weather
| Month | Avg Temperature | Precipitation | Summary |
|---|---|---|---|
| January | 32°F (-0°C) | 3.0 in | Coldest, Driest |
| February | 33°F (0°C) | 3.1 in | |
| March | 39°F (4°C) | 4.6 in | Wettest |
| April | 49°F (9°C) | 4.1 in | |
| May | 59°F (15°C) | 3.5 in | |
| June | 68°F (20°C) | 3.7 in | |
| July | 74°F (23°C) | 3.2 in | Warmest |
| August | 73°F (23°C) | 3.0 in | |
| September | 66°F (19°C) | 3.9 in | |
| October | 55°F (13°C) | 4.0 in | |
| November | 45°F (7°C) | 3.7 in | |
| December | 37°F (3°C) | 4.5 in |
Middle Island has a seasonal temperature swing of 43°F / from 32°F in January to 74°F in July. Total annual precipitation is 44.2 inches, with March being the wettest month (4.6") and January the driest (3.0").