| 2023 Hardiness Zone: | Zone 7b: 5°F to 10°F |
| 2012 Hardiness Zone: | Zone 7b: 5°F to 10°F Zone 7a: 0°F to 5°F |
| 1990 Hardiness Zone: | Zone 7a: 0F to 5F |
| Average First Frost Date: | Nov. 1 - Nov. 10 |
| Average Last Frost Date: | Apr. 11 - Apr. 20 |
| Koppen-Geiger Climate Zone: | Cfa - Humid Subtropical Climate |
| Ecoregion: | 84a - Cape Cod and Islands |
| Heat Zone Days: | Rare Over 86°F |
Annual Climate Data for ZIP Code 11795 - West Islip, NY | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 23 | 24 | 32 | 40 | 50 | 59 | 66 | 65 | 58 | 46 | 37 | 28 | 44 |
| Avg Max Temp (°F) | 38 | 40 | 48 | 58 | 69 | 77 | 83 | 82 | 74 | 64 | 53 | 44 | 61 |
| Avg Precip (In.) | 4.16 | 3.23 | 4.35 | 4.24 | 4.08 | 3.89 | 3.58 | 4.17 | 3.81 | 3.68 | 4 | 3.95 | 47.15 |