Armonk, New York has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 43.1 °F (low) to 61.4 °F (high). Annual precipitation averages 50.5 Inches. Armonk 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 | 21.7 °F | 37.3 °F | 3.9 in. |
| February | 23.2 °F | 40.3 °F | 2.81 in. |
| March | 30.0 °F | 48.1 °F | 4.12 in. |
| April | 40.2 °F | 60.7 °F | 3.96 in. |
| May | 49.7 °F | 70.9 °F | 3.69 in. |
| June | 59.3 °F | 79.3 °F | 4.68 in. |
| July | 64.7 °F | 84.3 °F | 4.36 in. |
| August | 63.4 °F | 82.2 °F | 4.92 in. |
| September | 56.3 °F | 75.2 °F | 4.84 in. |
| October | 44.9 °F | 63.7 °F | 4.74 in. |
| November | 35.4 °F | 52.8 °F | 4.21 in. |
| December | 28.0 °F | 42.4 °F | 4.3 in. |
| Annual | 43.1 °F | 61.4 °F | 50.53 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 |