Haydenville, Ohio has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 40.8 °F (low) to 63.3 °F (high). Annual precipitation averages 41.9 Inches. 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 | 19.9 °F | 38.4 °F | 3.17 in. |
| February | 21.6 °F | 41.8 °F | 2.67 in. |
| March | 28.9 °F | 51.7 °F | 3.69 in. |
| April | 38.9 °F | 65.0 °F | 3.85 in. |
| May | 49.5 °F | 73.6 °F | 4.14 in. |
| June | 58.4 °F | 81.3 °F | 4.4 in. |
| July | 62.3 °F | 84.5 °F | 4.35 in. |
| August | 60.4 °F | 83.6 °F | 3.51 in. |
| September | 52.8 °F | 77.6 °F | 3.16 in. |
| October | 40.8 °F | 66.1 °F | 2.93 in. |
| November | 31.4 °F | 53.7 °F | 2.9 in. |
| December | 25.2 °F | 42.8 °F | 3.13 in. |
| Annual | 40.8 °F | 63.3 °F | 41.9 in. |
| 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 : -10°F to -5°F |
| Plant Hardiness Zone - 2012 | Zone 6a : -10°F to -5°F |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Dfa - Humid Continental Hot Summers With Year Around Precipitation |