Bergholz, Ohio has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 5.2 °C (low) to 16.6 °C (high). Annual precipitation averages 1057.1 Millimeters. Bergholz is located in USDA Plant Hardiness Zone 6b. The growing season typically runs from the last frost around Apr. 11 - Apr. 20 through the first frost around Oct. 21 - Oct. 31.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -6.5 °C | 2.6 °C | 78.23 mm |
| February | -5.7 °C | 4.3 °C | 59.44 mm |
| March | -1.7 °C | 9.7 °C | 81.53 mm |
| April | 3.9 °C | 17.1 °C | 93.98 mm |
| May | 9.7 °C | 22.4 °C | 102.62 mm |
| June | 14.5 °C | 26.7 °C | 112.52 mm |
| July | 16.8 °C | 28.7 °C | 107.19 mm |
| August | 15.9 °C | 28.2 °C | 96.01 mm |
| September | 12.2 °C | 24.8 °C | 96.77 mm |
| October | 5.9 °C | 18.1 °C | 77.47 mm |
| November | 0.7 °C | 11.1 °C | 73.91 mm |
| December | -3.4 °C | 5.1 °C | 77.47 mm |
| Annual | 5.2 °C | 16.6 °C | 1057.14 mm |
| Average First Frost Date | Oct. 21 - Oct. 31 |
| Average Last Frost Date | Apr. 11 - Apr. 20 |
| 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 | Dfb - Humid Continental Mild Summer, Wet All Year |