Seneca Knolls, New York has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 3.5 °C (low) to 13.9 °C (high). Annual precipitation averages 1110.2 Millimeters. Seneca Knolls 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 | -9.3 °C | -0.5 °C | 84.33 mm |
| February | -8.8 °C | 0.7 °C | 72.9 mm |
| March | -4.7 °C | 5.1 °C | 80.26 mm |
| April | 1.7 °C | 13.2 °C | 89.41 mm |
| May | 8.1 °C | 20.3 °C | 91.19 mm |
| June | 13.1 °C | 24.8 °C | 100.33 mm |
| July | 15.7 °C | 27.3 °C | 100.84 mm |
| August | 14.9 °C | 26.6 °C | 98.55 mm |
| September | 11.1 °C | 22.8 °C | 93.47 mm |
| October | 5.4 °C | 15.4 °C | 111.76 mm |
| November | 0.3 °C | 8.8 °C | 93.47 mm |
| December | -5.1 °C | 2.6 °C | 93.73 mm |
| Annual | 3.5 °C | 13.9 °C | 1110.24 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 |