West Kill, New York has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 34.2 °F (low) to 56.2 °F (high). Annual precipitation averages 48.4 Inches. West Kill is located in USDA Plant Hardiness Zone 5b. The growing season typically runs from the last frost around May 11 - May 20 through the first frost around Sep. 21 - Sep. 30.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 12.3 °F | 31.7 °F | 3.52 in. |
| February | 13.4 °F | 34.6 °F | 2.7 in. |
| March | 20.5 °F | 41.9 °F | 4.14 in. |
| April | 31.5 °F | 55.2 °F | 3.73 in. |
| May | 41.5 °F | 66.9 °F | 3.88 in. |
| June | 50.7 °F | 74.5 °F | 4.87 in. |
| July | 55.3 °F | 78.5 °F | 4.57 in. |
| August | 53.9 °F | 77.2 °F | 4.2 in. |
| September | 46.9 °F | 70.7 °F | 4.57 in. |
| October | 36.5 °F | 58.8 °F | 4.85 in. |
| November | 27.9 °F | 47.0 °F | 3.56 in. |
| December | 19.8 °F | 36.8 °F | 3.83 in. |
| Annual | 34.2 °F | 56.2 °F | 48.42 in. |
| Average First Frost Date | Sep. 21 - Sep. 30 |
| Average Last Frost Date | May 11 - May 20 |
| Average Days With Frost | 150-180 Days |
| Plant Hardiness Zone | Zone 5b : -15°F to -10°F |
| Plant Hardiness Zone - 2012 | Zone 5b : -15°F to -10°F |
| Current Drought Conditions | Abnormally Dry |
| Köppen Climate Classification | Dfb - Humid Continental Mild Summer, Wet All Year |