Huntsville, Ohio has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 41.3 °F (low) to 60.3 °F (high). Annual precipitation averages 41.5 Inches. Huntsville 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 | 18.5 °F | 33.5 °F | 2.94 in. |
| February | 20.6 °F | 37.1 °F | 2.25 in. |
| March | 28.9 °F | 47.4 °F | 3.06 in. |
| April | 39.1 °F | 60.6 °F | 4.08 in. |
| May | 50.5 °F | 71.3 °F | 4.29 in. |
| June | 59.9 °F | 79.9 °F | 4.62 in. |
| July | 62.8 °F | 83.2 °F | 4.52 in. |
| August | 61.2 °F | 81.9 °F | 3.57 in. |
| September | 54.1 °F | 76.4 °F | 3.18 in. |
| October | 42.9 °F | 63.8 °F | 2.9 in. |
| November | 32.5 °F | 49.9 °F | 3.12 in. |
| December | 24.4 °F | 38.5 °F | 2.94 in. |
| Annual | 41.3 °F | 60.3 °F | 41.47 in. |
| Average First Frost Date | Oct. 11 - Oct. 20 |
| Average Last Frost Date | Apr. 21 - Apr. 30 |
| Average Days With Frost | 100-125 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 |