Winchester, 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 63.8 °F (high). Annual precipitation averages 46.8 Inches. Winchester 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 | 22.1 °F | 39.3 °F | 3.27 in. |
| February | 24.6 °F | 43.5 °F | 3.2 in. |
| March | 32.0 °F | 52.6 °F | 4.35 in. |
| April | 41.8 °F | 64.9 °F | 4.57 in. |
| May | 52.4 °F | 73.3 °F | 4.94 in. |
| June | 61.0 °F | 81.7 °F | 4.68 in. |
| July | 64.0 °F | 84.8 °F | 4.86 in. |
| August | 62.1 °F | 83.8 °F | 3.57 in. |
| September | 55.2 °F | 78.4 °F | 3.33 in. |
| October | 43.9 °F | 66.6 °F | 3.18 in. |
| November | 33.9 °F | 53.5 °F | 3.17 in. |
| December | 27.2 °F | 43.4 °F | 3.67 in. |
| Annual | 43.4 °F | 63.8 °F | 46.79 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 |