Uniondale, New York has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 46.2 °F (low) to 62.5 °F (high). Annual precipitation averages 48.6 Inches. Uniondale 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 | 25.8 °F | 40.0 °F | 3.8 in. |
| February | 27.0 °F | 42.2 °F | 3.04 in. |
| March | 33.0 °F | 48.9 °F | 4.41 in. |
| April | 42.2 °F | 60.1 °F | 4.07 in. |
| May | 51.6 °F | 69.8 °F | 3.92 in. |
| June | 61.4 °F | 78.8 °F | 4.38 in. |
| July | 67.5 °F | 84.6 °F | 4.18 in. |
| August | 66.4 °F | 83.1 °F | 4.41 in. |
| September | 59.8 °F | 76.6 °F | 4.04 in. |
| October | 48.8 °F | 65.4 °F | 4.68 in. |
| November | 39.1 °F | 54.6 °F | 3.36 in. |
| December | 31.7 °F | 45.3 °F | 4.28 in. |
| Annual | 46.2 °F | 62.5 °F | 48.57 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 | Severe Drought |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |