Kirkwood, New York has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 2.5 °C (low) to 13.3 °C (high). Annual precipitation averages 1095.3 Millimeters. Kirkwood 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 | -9.9 °C | -0.7 °C | 73.66 mm |
| February | -9.4 °C | 0.7 °C | 59.94 mm |
| March | -5.4 °C | 5.2 °C | 81.79 mm |
| April | 0.9 °C | 12.7 °C | 93.22 mm |
| May | 7 °C | 19.4 °C | 93.22 mm |
| June | 12.1 °C | 24 °C | 110.24 mm |
| July | 14.7 °C | 26.2 °C | 105.92 mm |
| August | 13.7 °C | 25.6 °C | 109.22 mm |
| September | 9.7 °C | 21.8 °C | 103.63 mm |
| October | 3.8 °C | 14.8 °C | 103.38 mm |
| November | -1.4 °C | 7.9 °C | 79.76 mm |
| December | -6.1 °C | 1.9 °C | 81.28 mm |
| Annual | 2.5 °C | 13.3 °C | 1095.26 mm |
| 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 : -23.3°C to -20.6°C |
| Plant Hardiness Zone - 2012 | Zone 5b : -26.1°C to -23.3°C |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Dfb - Humid Continental Mild Summer, Wet All Year |