Moriches, New York has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 43.5 °F (low) to 60.8 °F (high). Annual precipitation averages 46.8 Inches. Moriches is located in USDA Plant Hardiness Zone 7a. The growing season typically runs from the last frost around Apr. 11 - Apr. 20 through the first frost around Oct. 21 - Oct. 31.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 22.9 °F | 39.1 °F | 3.79 in. |
| February | 23.9 °F | 40.7 °F | 3.41 in. |
| March | 30.2 °F | 47.3 °F | 4.81 in. |
| April | 39.3 °F | 57.8 °F | 4.16 in. |
| May | 49.0 °F | 67.7 °F | 3.48 in. |
| June | 58.7 °F | 76.6 °F | 3.85 in. |
| July | 65.0 °F | 82.4 °F | 3.08 in. |
| August | 64.0 °F | 81.1 °F | 3.68 in. |
| September | 57.3 °F | 74.8 °F | 3.54 in. |
| October | 46.2 °F | 63.8 °F | 4.61 in. |
| November | 36.4 °F | 53.8 °F | 3.75 in. |
| December | 28.7 °F | 44.5 °F | 4.66 in. |
| Annual | 43.5 °F | 60.8 °F | 46.82 in. |
| Average First Frost Date | Oct. 21 - Oct. 31 |
| Average Last Frost Date | Apr. 11 - Apr. 20 |
| Average Days With Frost | 75-100 Days |
| Plant Hardiness Zone | Zone 7a : 0°F to 5°F |
| Plant Hardiness Zone - 2012 | Zone 7a : 0°F to 5°F |
| Current Drought Conditions | Severe Drought |
| Köppen Climate Classification | Dfb - Humid Continental Mild Summer, Wet All Year |