| 2023 Hardiness Zone: | Zone 7a: 0°F to 5°F |
| 2012 Hardiness Zone: | Zone 7a: 0°F to 5°F |
| 1990 Hardiness Zone: | Zone 7a: 0F to 5F |
| 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: | 84c - Barrier Islands - Coastal Marshes |
| Heat Zone Days: | Rare Over 86°F |
Annual Climate Data for ZIP Code 11934 - Center Moriches, NY | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 23 | 25 | 31 | 40 | 49 | 59 | 65 | 64 | 57 | 46 | 37 | 28 | 44 |
| Avg Max Temp (°F) | 39 | 40 | 48 | 58 | 69 | 78 | 83 | 81 | 74 | 64 | 54 | 44 | 61 |
| Avg Precip (In.) | 4.38 | 3.49 | 4.35 | 4.24 | 3.92 | 3.89 | 3.29 | 4.21 | 3.76 | 3.78 | 4.19 | 4.18 | 47.7 |