Merrick, New York has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 46.5 °F (low) to 61.9 °F (high). Annual precipitation averages 47.1 Inches. Merrick 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 | 39.6 °F | 3.78 in. |
| February | 27.2 °F | 41.5 °F | 2.99 in. |
| March | 33.2 °F | 48.0 °F | 4.35 in. |
| April | 42.4 °F | 59.4 °F | 4.11 in. |
| May | 51.9 °F | 69.1 °F | 3.79 in. |
| June | 61.7 °F | 78.1 °F | 4.21 in. |
| July | 68.0 °F | 83.9 °F | 3.83 in. |
| August | 67.0 °F | 82.9 °F | 4.19 in. |
| September | 60.2 °F | 76.5 °F | 3.88 in. |
| October | 49.1 °F | 65.2 °F | 4.51 in. |
| November | 39.6 °F | 54.2 °F | 3.24 in. |
| December | 32.1 °F | 44.9 °F | 4.2 in. |
| Annual | 46.5 °F | 61.9 °F | 47.08 in. |
| Average First Frost Date | Nov. 11 - Nov. 20 |
| Average Last Frost Date | Apr. 1 - Apr. 10 |
| Average Days With Frost | 50-75 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 | Moderate Drought |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |