Harveysburg, Ohio has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 43.4 °F (low) to 62.7 °F (high). Annual precipitation averages 42.8 Inches. Harveysburg 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. 11 - Oct. 20.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 21.4 °F | 37.0 °F | 3.18 in. |
| February | 23.5 °F | 40.6 °F | 2.59 in. |
| March | 31.6 °F | 50.8 °F | 3.68 in. |
| April | 42.1 °F | 63.5 °F | 4.44 in. |
| May | 52.9 °F | 73.4 °F | 4.63 in. |
| June | 61.7 °F | 81.6 °F | 4.63 in. |
| July | 64.8 °F | 84.5 °F | 4.17 in. |
| August | 62.7 °F | 83.6 °F | 3.16 in. |
| September | 55.5 °F | 78.1 °F | 2.97 in. |
| October | 44.2 °F | 66.0 °F | 3.03 in. |
| November | 34.2 °F | 52.5 °F | 3.04 in. |
| December | 26.5 °F | 41.3 °F | 3.27 in. |
| Annual | 43.4 °F | 62.7 °F | 42.79 in. |
| Average First Frost Date | Oct. 11 - Oct. 20 |
| 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 |