Kilbourne, Ohio has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 5.5 °C (low) to 16.2 °C (high). Annual precipitation averages 1042.4 Millimeters. Kilbourne is located in USDA Plant Hardiness Zone 6b. 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 | -6.8 °C | 1.6 °C | 75.95 mm |
| February | -5.9 °C | 3.3 °C | 57.91 mm |
| March | -1.3 °C | 9.2 °C | 79.25 mm |
| April | 4.6 °C | 16.6 °C | 100.08 mm |
| May | 10.6 °C | 22.4 °C | 107.19 mm |
| June | 15.7 °C | 26.9 °C | 119.38 mm |
| July | 17.5 °C | 28.7 °C | 110.74 mm |
| August | 16.3 °C | 27.9 °C | 88.39 mm |
| September | 12.2 °C | 24.9 °C | 82.55 mm |
| October | 5.9 °C | 18 °C | 71.37 mm |
| November | 0.5 °C | 10.6 °C | 75.18 mm |
| December | -3.7 °C | 4.2 °C | 74.42 mm |
| Annual | 5.5 °C | 16.2 °C | 1042.41 mm |
| Average First Frost Date | Oct. 11 - Oct. 20 |
| Average Last Frost Date | Apr. 21 - Apr. 30 |
| Average Days With Frost | 100-125 Days |
| Plant Hardiness Zone | Zone 6b : -20.6°C to -17.8°C |
| Plant Hardiness Zone - 2012 | Zone 6a : -23.3°C to -20.6°C |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Dfa - Humid Continental Hot Summers With Year Around Precipitation |