Washingtonville, Ohio has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 39.1 °F (low) to 60.6 °F (high). Annual precipitation averages 40.5 Inches. Washingtonville is located in USDA Plant Hardiness Zone 6a. The growing season typically runs from the last frost around May 11 - May 20 through the first frost around Oct. 1 - Oct. 10.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 18.1 °F | 34.8 °F | 2.9 in. |
| February | 19.0 °F | 37.8 °F | 2.26 in. |
| March | 26.6 °F | 47.3 °F | 3.1 in. |
| April | 37.0 °F | 60.9 °F | 3.99 in. |
| May | 46.8 °F | 71.3 °F | 3.7 in. |
| June | 56.1 °F | 79.6 °F | 4.27 in. |
| July | 60.0 °F | 83.3 °F | 4.36 in. |
| August | 58.0 °F | 82.0 °F | 3.16 in. |
| September | 51.3 °F | 75.9 °F | 3.81 in. |
| October | 40.4 °F | 63.5 °F | 3.19 in. |
| November | 31.8 °F | 50.5 °F | 2.87 in. |
| December | 24.2 °F | 39.7 °F | 2.88 in. |
| Annual | 39.1 °F | 60.6 °F | 40.49 in. |
| Average First Frost Date | Oct. 1 - Oct. 10 |
| Average Last Frost Date | May 11 - May 20 |
| 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 | Dfb - Humid Continental Mild Summer, Wet All Year |