Country Knolls, New York has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 4 °C (low) to 14.6 °C (high). Annual precipitation averages 1107.4 Millimeters. Country Knolls is located in USDA Plant Hardiness Zone 5b. 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 | -9.2 °C | -0.1 °C | 77.47 mm |
| February | -8.6 °C | 1.6 °C | 62.23 mm |
| March | -3.8 °C | 6.5 °C | 80.26 mm |
| April | 2.5 °C | 14.4 °C | 89.41 mm |
| May | 8.9 °C | 21.1 °C | 91.19 mm |
| June | 14 °C | 25.6 °C | 117.6 mm |
| July | 16.5 °C | 28.3 °C | 116.08 mm |
| August | 15.8 °C | 27.1 °C | 104.9 mm |
| September | 11.5 °C | 23.1 °C | 96.01 mm |
| October | 5.3 °C | 16 °C | 106.17 mm |
| November | -0.3 °C | 9.1 °C | 78.49 mm |
| December | -5.2 °C | 2.8 °C | 87.63 mm |
| Annual | 4 °C | 14.6 °C | 1107.44 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 5b : -26.1°C to -23.3°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 |