Copiague, New York has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 46.3 °F (low) to 61.6 °F (high). Annual precipitation averages 45.8 Inches. Copiague 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 | 25.9 °F | 39.6 °F | 3.78 in. |
| February | 27.0 °F | 41.6 °F | 3.08 in. |
| March | 33.0 °F | 47.9 °F | 4.38 in. |
| April | 42.1 °F | 58.7 °F | 4.12 in. |
| May | 51.7 °F | 68.3 °F | 3.39 in. |
| June | 61.7 °F | 77.7 °F | 3.88 in. |
| July | 67.6 °F | 83.4 °F | 3.23 in. |
| August | 66.7 °F | 82.4 °F | 4.03 in. |
| September | 60.0 °F | 75.7 °F | 3.72 in. |
| October | 49.1 °F | 64.5 °F | 4.5 in. |
| November | 39.4 °F | 54.1 °F | 3.32 in. |
| December | 31.8 °F | 44.9 °F | 4.33 in. |
| Annual | 46.3 °F | 61.6 °F | 45.76 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 7a : 0°F to 5°F |
| Current Drought Conditions | Severe Drought |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |