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Islip is the #31 city in New York by population, with a population of 120,243 across 3 ZIP codes. Average temperatures range from 46.4°F to 59.8°F, with 48.6" of annual precipitation. Construction forms the backbone of the local economy (430 firms).
Average monthly temperatures and precipitation.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg High | 39° | 40° | 47° | 56° | 66° | 75° | 81° | 81° | 74° | 63° | 53° | 44° |
| Avg Low | 26° | 27° | 33° | 43° | 51° | 62° | 69° | 68° | 60° | 49° | 39° | 31° |
| Precip | 3.5" | 4.1" | 4.5" | 3.9" | 3.4" | 3.8" | 4.2" | 5.3" | 4.1" | 3.7" | 3.2" | 4.9" |
| Snow | 3.4" | 3.1" | 2.2" | 0.2" | - | - | - | - | - | - | 0.2" | 1.5" |
| Industry | Establishments |
|---|---|
| Construction | 430 |
| Retail trade | 388 |
| Other services (except public administration) | 311 |
| Health care and social assistance | 269 |
| Accommodation and food services | 230 |
| Professional, scientific, and technical services | 221 |
| Administrative and support and waste management and remediation services | 219 |
| Wholesale trade | 139 |
| Transportation and warehousing | 111 |
| Real estate and rental and leasing | 97 |
Islip has 2 properties listed on the National Register of Historic Places, including:
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