| 2023 Hardiness Zone: | Zone 7b: 5°F to 10°F Zone 7a: 0°F to 5°F |
| 2012 Hardiness Zone: | Zone 7a: 0°F to 5°F |
| 1990 Hardiness Zone: | Zone 6b: -5F to 0F |
| Average First Frost Date: | Oct. 21 - Oct. 31 |
| Average Last Frost Date: | Apr. 21 - Apr. 30 |
| Koppen-Geiger Climate Zone: | Dfb - Humid Continental Mild Summer, Wet All Year |
| Ecoregion: | 84a - Cape Cod and Islands |
| Heat Zone Days: | Rare Over 86°F |
Annual Climate Data for ZIP Code 06390 - Fishers Island, NY | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 20 | 22 | 29 | 38 | 48 | 57 | 63 | 62 | 55 | 44 | 35 | 26 | 42 |
| Avg Max Temp (°F) | 38 | 40 | 47 | 56 | 67 | 75 | 81 | 80 | 73 | 63 | 53 | 43 | 60 |
| Avg Precip (In.) | 4.45 | 3.55 | 4.5 | 4.32 | 3.86 | 3.64 | 3.35 | 4.31 | 3.98 | 4.03 | 4.57 | 4.34 | 48.9 |