| 2023 Hardiness Zone: | Zone 7b: 5°F to 10°F | |
| 2012 Hardiness Zone: | Zone 7a: 0°F to 5°F | |
| 1990 Hardiness Zone: | Zone 7a: 0F to 5F | |
| Average First Frost Date: | Nov. 11 - Nov. 20 | |
| Average Last Frost Date: | Apr. 11 - Apr. 20 | |
| Koppen-Geiger Climate Zone: | Dfa - Humid Continental Hot Summers | |
| Ecoregion: | 59g - Long Island Sound Coastal Lowland | |
| Current Drought Status: | Exceptional Drought | |
| Heat Zone Days: | Rare Over 86°F |
Annual Climate Data for ZIP Code 11791 - Syosset, NY | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 24 | 25 | 32 | 40 | 50 | 59 | 65 | 64 | 57 | 46 | 38 | 29 | 44 |
| Avg Max Temp (°F) | 38 | 40 | 49 | 59 | 70 | 79 | 84 | 82 | 74 | 64 | 53 | 42 | 61 |
| Avg Precip (In.) | 4.01 | 3.07 | 4.31 | 4.24 | 4.24 | 3.78 | 3.93 | 3.97 | 4.02 | 3.68 | 4.03 | 3.83 | 47.1 |