| | Islip, NY | Hempstead, NY | United States |
| Rainfall | 46.9 | 45.2 | 38.1 |
| Snowfall | 26.7 | 22.8 | 27.8 |
| Precipitation Days | 111.7 | 125.6 | 106.2 |
| Sunny | 206 | 172 | 205 |
| Avg. July High | 82.4 | 82.2 | 85.8 |
| Avg. Jan. Low | 23.4 | 25.2 | 21.7 |
| Comfort Index (higher=better) | 7.2 | 7.2 | 7 |
| UV Index | 3.7 | 3.6 | 4.3 |
| Elevation ft. | 13 | 56 | 2443 |