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Central Islip, NY
Full City Profile · New York · Nassau County County
3.2
/5.0
B
Good
37,751
Population
5,272/sq mi density
$110,166
Median Income
$33,129 per capita
$405,000
Home Value
$561,606 Zillow
$2,106
Median Rent
40.6% income on rent
53°F
Avg Temperature
275 sunny days/yr
22
Violent Crime/100K
356 property/100K
B
Overall
3.2 / 5.0
Good overall score based on economy, affordability, safety and education
A+
Economy
4.7 / 5.0
$110,166 median income, 3.7% unemployment
A+
Affordability
4.6 / 5.0
$405,000 home value, $2,106/mo rent
F
Safety
1.0 / 5.0
22 violent crimes/100K
C
Education
2.5 / 5.0
18.4% bachelor's degree or higher
Central Islip experiences four distinct seasons with an average annual temperature of 53°F (12°C). Winters average 32°F in January while summers reach 75°F in July. The area gets 275 sunny days per year. Annual precipitation totals 46.0 inches. The area receives 31.8 inches of snow annually. Air quality is rated Good with a median AQI of 36.
Temperature
32°F Jan (-0°C)
75°F Jul (24°C)
| Annual Average | 53.1°F |
| 2% below US avg | |
| January Average | 32°F (-0°C) |
| July Average | 75°F (24°C) |
| Sunny Days | 275 days/yr |
Geography
| Elevation | 69 ft (21 m) |
| Area | 7.1 sq mi (18.4 km²) |
| Population Density | 5,272/sq mi |
| Coordinates | 40.7836°N, 73.1945°W |
| Timezone | America/New_York |
| County | Nassau County County |
| Nearest Airport | John F Kennedy International (JFK) 32 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
2 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 | — | 8 km |
| 1895 | HIGH BRIDGE, NJ | Earthquake | — | — | 143 km |
Source: NOAA/NCEI Historical Tsunami Database. Sorted by wave height.
Monthly Weather
| Month | Avg Temperature | Precipitation | Summary |
|---|---|---|---|
| January | 32°F (-0°C) | 3.5 in | Coldest |
| February | 32°F (0°C) | 3.0 in | |
| March | 40°F (5°C) | 4.1 in | Wettest |
| April | 50°F (10°C) | 3.8 in | |
| May | 60°F (15°C) | 3.5 in | |
| June | 69°F (20°C) | 2.9 in | Driest |
| July | 75°F (24°C) | 3.1 in | Warmest |
| August | 73°F (23°C) | 3.9 in | |
| September | 66°F (19°C) | 3.2 in | |
| October | 55°F (13°C) | 3.2 in | |
| November | 46°F (8°C) | 3.8 in | |
| December | 36°F (2°C) | 3.7 in |
Central Islip has a seasonal temperature swing of 43°F / from 32°F in January to 75°F in July. Total annual precipitation is 41.7 inches, with March being the wettest month (4.1") and June the driest (2.9").