Yankee Lake, Ohio has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 4.3 °C (low) to 15.9 °C (high). Annual precipitation averages 1049.8 Millimeters. Yankee Lake 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 | -7.4 °C | 1.6 °C | 73.15 mm |
| February | -7.1 °C | 3.2 °C | 57.66 mm |
| March | -2.8 °C | 8.4 °C | 74.17 mm |
| April | 2.9 °C | 16.1 °C | 96.01 mm |
| May | 8.6 °C | 22 °C | 97.54 mm |
| June | 13.6 °C | 26.6 °C | 109.98 mm |
| July | 15.8 °C | 28.7 °C | 112.78 mm |
| August | 14.8 °C | 27.9 °C | 90.68 mm |
| September | 11.1 °C | 24.3 °C | 101.09 mm |
| October | 5.2 °C | 17.4 °C | 81.79 mm |
| November | 0.4 °C | 10.3 °C | 75.44 mm |
| December | -3.9 °C | 4.3 °C | 79.5 mm |
| Annual | 4.3 °C | 15.9 °C | 1049.79 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 |