McConnelsville, Ohio has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 41 °F (low) to 63.3 °F (high). Annual precipitation averages 43.3 Inches. McConnelsville is located in USDA Plant Hardiness Zone 6b. 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 | 20.1 °F | 38.3 °F | 3.34 in. |
| February | 21.8 °F | 41.7 °F | 2.65 in. |
| March | 28.9 °F | 51.7 °F | 3.75 in. |
| April | 38.8 °F | 65.2 °F | 3.98 in. |
| May | 49.3 °F | 73.6 °F | 4.4 in. |
| June | 58.3 °F | 81.1 °F | 4.45 in. |
| July | 62.4 °F | 84.4 °F | 4.48 in. |
| August | 60.8 °F | 83.8 °F | 3.58 in. |
| September | 53.1 °F | 77.6 °F | 3.59 in. |
| October | 41.0 °F | 66.0 °F | 2.93 in. |
| November | 31.6 °F | 53.5 °F | 3.05 in. |
| December | 25.4 °F | 42.7 °F | 3.11 in. |
| Annual | 41 °F | 63.3 °F | 43.31 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 6b : -5°F to 0°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 |