Westvale, New York has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 38.7 °F (low) to 57.3 °F (high). Annual precipitation averages 43 Inches. Westvale is located in USDA Plant Hardiness Zone 6a. The growing season typically runs from the last frost around Apr. 21 - Apr. 30 through the first frost around Oct. 11 - Oct. 20.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 15.6 °F | 31.4 °F | 3.16 in. |
| February | 16.5 °F | 33.4 °F | 3.03 in. |
| March | 24.0 °F | 41.4 °F | 3.3 in. |
| April | 35.4 °F | 55.8 °F | 3.7 in. |
| May | 47.0 °F | 68.7 °F | 3.56 in. |
| June | 56.0 °F | 76.9 °F | 3.89 in. |
| July | 60.9 °F | 81.5 °F | 4.03 in. |
| August | 59.4 °F | 80.1 °F | 3.91 in. |
| September | 52.1 °F | 73.3 °F | 3.3 in. |
| October | 42.0 °F | 60.1 °F | 4.2 in. |
| November | 32.7 °F | 47.9 °F | 3.28 in. |
| December | 23.3 °F | 36.8 °F | 3.59 in. |
| Annual | 38.7 °F | 57.3 °F | 42.95 in. |
| Average First Frost Date | Oct. 11 - Oct. 20 |
| Average Last Frost Date | Apr. 21 - Apr. 30 |
| Average Days With Frost | 125-150 Days |
| Plant Hardiness Zone | Zone 6a : -10°F to -5°F |
| Plant Hardiness Zone - 2012 | Zone 5b : -15°F to -10°F |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Dfb - Humid Continental Mild Summer, Wet All Year |