Wallkill, New York has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 39.9 °F (low) to 60.9 °F (high). Annual precipitation averages 46 Inches. Wallkill is located in USDA Plant Hardiness Zone 6b. 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 | 17.5 °F | 35.7 °F | 3.25 in. |
| February | 19.0 °F | 38.6 °F | 2.64 in. |
| March | 27.1 °F | 47.0 °F | 3.68 in. |
| April | 37.9 °F | 60.4 °F | 3.65 in. |
| May | 48.0 °F | 71.1 °F | 3.64 in. |
| June | 57.0 °F | 79.6 °F | 4.52 in. |
| July | 62.1 °F | 84.6 °F | 4.31 in. |
| August | 60.4 °F | 83.0 °F | 4.29 in. |
| September | 52.8 °F | 75.8 °F | 4.43 in. |
| October | 41.5 °F | 63.5 °F | 4.29 in. |
| November | 31.9 °F | 51.5 °F | 3.39 in. |
| December | 23.6 °F | 40.5 °F | 3.91 in. |
| Annual | 39.9 °F | 60.9 °F | 46 in. |
| Average First Frost Date | Oct. 21 - Oct. 31 |
| Average Last Frost Date | Apr. 11 - Apr. 20 |
| Average Days With Frost | 100-125 Days |
| Plant Hardiness Zone | Zone 6b : -5°F to 0°F |
| Plant Hardiness Zone - 2012 | Zone 5b : -15°F to -10°F |
| Current Drought Conditions | Moderate Drought |
| Köppen Climate Classification | Dfb - Humid Continental Mild Summer, Wet All Year |