Killbuck, Ohio has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 4.2 °C (low) to 16.3 °C (high). Annual precipitation averages 1047.5 Millimeters. Killbuck is located in USDA Plant Hardiness Zone 6a. The growing season typically runs from the last frost around May 1 - May 10 through the first frost around Oct. 11 - Oct. 20.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -7.3 °C | 2 °C | 76.96 mm |
| February | -6.7 °C | 3.7 °C | 58.67 mm |
| March | -2.6 °C | 9.2 °C | 82.3 mm |
| April | 2.8 °C | 16.7 °C | 98.04 mm |
| May | 8.8 °C | 22.2 °C | 104.65 mm |
| June | 14 °C | 26.9 °C | 124.71 mm |
| July | 15.9 °C | 28.7 °C | 104.39 mm |
| August | 15 °C | 28.1 °C | 90.17 mm |
| September | 10.7 °C | 24.6 °C | 81.03 mm |
| October | 4.3 °C | 18.1 °C | 77.22 mm |
| November | -0.6 °C | 10.8 °C | 73.66 mm |
| December | -4.4 °C | 4.6 °C | 75.69 mm |
| Annual | 4.2 °C | 16.3 °C | 1047.49 mm |
| Average First Frost Date | Oct. 11 - Oct. 20 |
| Average Last Frost Date | May 1 - May 10 |
| Average Days With Frost | 125-150 Days |
| Plant Hardiness Zone | Zone 6a : -23.3°C to -20.6°C |
| Plant Hardiness Zone - 2012 | Zone 6a : -23.3°C to -20.6°C |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Dfb - Humid Continental Mild Summer, Wet All Year |