Waynesburg, Ohio has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 41.4 °F (low) to 60.9 °F (high). Annual precipitation averages 41.7 Inches. Waynesburg 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. 21 - Oct. 31.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 20.0 °F | 35.1 °F | 3.07 in. |
| February | 21.2 °F | 38.1 °F | 2.31 in. |
| March | 28.9 °F | 47.8 °F | 3.24 in. |
| April | 39.2 °F | 61.5 °F | 3.68 in. |
| May | 49.8 °F | 71.6 °F | 4.08 in. |
| June | 58.7 °F | 79.8 °F | 4.8 in. |
| July | 62.6 °F | 83.4 °F | 4.34 in. |
| August | 60.8 °F | 82.2 °F | 3.75 in. |
| September | 53.9 °F | 76.0 °F | 3.43 in. |
| October | 42.8 °F | 64.0 °F | 3.18 in. |
| November | 33.3 °F | 50.8 °F | 2.89 in. |
| December | 25.7 °F | 39.9 °F | 2.96 in. |
| Annual | 41.4 °F | 60.9 °F | 41.73 in. |
| Average First Frost Date | Oct. 21 - Oct. 31 |
| 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 | Dfb - Humid Continental Mild Summer, Wet All Year |