Moriches, New York has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 6.4 °C (low) to 16 °C (high). Annual precipitation averages 1189.2 Millimeters. 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 | -5.1 °C | 3.9 °C | 96.27 mm |
| February | -4.5 °C | 4.8 °C | 86.61 mm |
| March | -1 °C | 8.5 °C | 122.17 mm |
| April | 4.1 °C | 14.3 °C | 105.66 mm |
| May | 9.4 °C | 19.8 °C | 88.39 mm |
| June | 14.8 °C | 24.8 °C | 97.79 mm |
| July | 18.3 °C | 28 °C | 78.23 mm |
| August | 17.8 °C | 27.3 °C | 93.47 mm |
| September | 14.1 °C | 23.8 °C | 89.92 mm |
| October | 7.9 °C | 17.7 °C | 117.09 mm |
| November | 2.4 °C | 12.1 °C | 95.25 mm |
| December | -1.8 °C | 6.9 °C | 118.36 mm |
| Annual | 6.4 °C | 16 °C | 1189.21 mm |
| 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 : -17.8°C to -15°C |
| Plant Hardiness Zone - 2012 | Zone 7a : -17.8°C to -15°C |
| Current Drought Conditions | Moderate Drought |
| Köppen Climate Classification | Dfb - Humid Continental Mild Summer, Wet All Year |