Seaford, New York has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 46.5 °F (low) to 61.8 °F (high). Annual precipitation averages 45.4 Inches. Seaford is located in USDA Plant Hardiness Zone 7b. The growing season typically runs from the last frost around Apr. 1 - Apr. 10 through the first frost around Nov. 11 - Nov. 20.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 26.1 °F | 39.7 °F | 3.77 in. |
| February | 27.2 °F | 41.7 °F | 3.01 in. |
| March | 33.2 °F | 48.0 °F | 4.22 in. |
| April | 42.4 °F | 59.1 °F | 4.12 in. |
| May | 51.9 °F | 68.7 °F | 3.55 in. |
| June | 61.8 °F | 77.9 °F | 3.94 in. |
| July | 67.8 °F | 83.6 °F | 3.48 in. |
| August | 66.8 °F | 82.6 °F | 3.93 in. |
| September | 60.2 °F | 76.2 °F | 3.73 in. |
| October | 49.3 °F | 65.0 °F | 4.32 in. |
| November | 39.6 °F | 54.2 °F | 3.1 in. |
| December | 32.0 °F | 45.0 °F | 4.18 in. |
| Annual | 46.5 °F | 61.8 °F | 45.35 in. |
| Average First Frost Date | Nov. 11 - Nov. 20 |
| Average Last Frost Date | Apr. 1 - Apr. 10 |
| Average Days With Frost | 75-100 Days |
| Plant Hardiness Zone | Zone 7b : 5°F to 10°F |
| Plant Hardiness Zone - 2012 | Zone 7b : 5°F to 10°F |
| Current Drought Conditions | Severe Drought |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |