Waynesville, Ohio has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 43.6 °F (low) to 63.2 °F (high). Annual precipitation averages 42.3 Inches. Waynesville 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 | 21.6 °F | 37.3 °F | 3.17 in. |
| February | 23.6 °F | 41.0 °F | 2.52 in. |
| March | 31.8 °F | 51.1 °F | 3.61 in. |
| April | 42.1 °F | 64.0 °F | 4.41 in. |
| May | 53.0 °F | 73.9 °F | 4.57 in. |
| June | 62.0 °F | 82.0 °F | 4.63 in. |
| July | 65.4 °F | 85.1 °F | 4.09 in. |
| August | 63.4 °F | 84.2 °F | 3.09 in. |
| September | 55.9 °F | 78.5 °F | 2.97 in. |
| October | 44.1 °F | 66.5 °F | 3.0 in. |
| November | 34.1 °F | 52.8 °F | 3.02 in. |
| December | 26.6 °F | 41.7 °F | 3.25 in. |
| Annual | 43.6 °F | 63.2 °F | 42.33 in. |
| 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 : -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 |