Haydenville, Ohio has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 4.9 °C (low) to 17.4 °C (high). Annual precipitation averages 1064.3 Millimeters. Haydenville is located in USDA Plant Hardiness Zone 6a. 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 | -6.7 °C | 3.6 °C | 80.52 mm |
| February | -5.8 °C | 5.4 °C | 67.82 mm |
| March | -1.7 °C | 10.9 °C | 93.73 mm |
| April | 3.8 °C | 18.3 °C | 97.79 mm |
| May | 9.7 °C | 23.1 °C | 105.16 mm |
| June | 14.7 °C | 27.4 °C | 111.76 mm |
| July | 16.8 °C | 29.2 °C | 110.49 mm |
| August | 15.8 °C | 28.7 °C | 89.15 mm |
| September | 11.6 °C | 25.3 °C | 80.26 mm |
| October | 4.9 °C | 18.9 °C | 74.42 mm |
| November | -0.3 °C | 12.1 °C | 73.66 mm |
| December | -3.8 °C | 6 °C | 79.5 mm |
| Annual | 4.9 °C | 17.4 °C | 1064.26 mm |
| Average First Frost Date | Oct. 11 - Oct. 20 |
| Average Last Frost Date | Apr. 21 - Apr. 30 |
| 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 | Dfa - Humid Continental Hot Summers With Year Around Precipitation |