Yorkville, Ohio has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 5.9 °C (low) to 17.1 °C (high). Annual precipitation averages 1051.1 Millimeters. Yorkville is located in USDA Plant Hardiness Zone 7a. The growing season typically runs from the last frost around Apr. 21 - Apr. 30 through the first frost around Oct. 21 - Oct. 31.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -5.7 °C | 3.4 °C | 82.04 mm |
| February | -4.6 °C | 5.1 °C | 64.52 mm |
| March | -1 °C | 10.3 °C | 86.36 mm |
| April | 4.6 °C | 17.4 °C | 89.66 mm |
| May | 10.3 °C | 22.8 °C | 103.89 mm |
| June | 15.2 °C | 27.1 °C | 109.47 mm |
| July | 17.6 °C | 28.9 °C | 100.84 mm |
| August | 16.8 °C | 28.4 °C | 93.22 mm |
| September | 12.9 °C | 25.2 °C | 94.49 mm |
| October | 6.6 °C | 18.6 °C | 74.93 mm |
| November | 1.1 °C | 11.7 °C | 73.41 mm |
| December | -2.6 °C | 5.8 °C | 78.23 mm |
| Annual | 5.9 °C | 17.1 °C | 1051.06 mm |
| Average First Frost Date | Oct. 21 - Oct. 31 |
| Average Last Frost Date | Apr. 21 - Apr. 30 |
| Average Days With Frost | 100-125 Days |
| Plant Hardiness Zone | Zone 7a : -17.8°C to -15°C |
| Plant Hardiness Zone - 2012 | Zone 6b : -20.6°C to -17.8°C |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Dfa - Humid Continental Hot Summers With Year Around Precipitation |