Winchester, Tennessee has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 48 °F (low) to 69.5 °F (high). Annual precipitation averages 57.6 Inches. Winchester is located in USDA Plant Hardiness Zone 7b. The growing season typically runs from the last frost around Apr. 1 - Apr. 10 through the first frost around Oct. 21 - Oct. 31.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 29.3 °F | 48.3 °F | 5.03 in. |
| February | 31.8 °F | 52.6 °F | 4.94 in. |
| March | 38.4 °F | 60.9 °F | 5.53 in. |
| April | 46.9 °F | 70.3 °F | 5.33 in. |
| May | 56.2 °F | 77.8 °F | 4.61 in. |
| June | 63.8 °F | 84.2 °F | 5.68 in. |
| July | 67.3 °F | 87.3 °F | 4.48 in. |
| August | 66.0 °F | 87.0 °F | 3.97 in. |
| September | 59.6 °F | 81.8 °F | 4.3 in. |
| October | 47.6 °F | 71.9 °F | 3.37 in. |
| November | 37.3 °F | 60.5 °F | 4.27 in. |
| December | 32.3 °F | 51.4 °F | 6.1 in. |
| Annual | 48 °F | 69.5 °F | 57.61 in. |
| Average First Frost Date | Oct. 21 - Oct. 31 |
| Average Last Frost Date | Apr. 1 - Apr. 10 |
| Average Days With Frost | 50-75 Days |
| Plant Hardiness Zone | Zone 7b : 5°F to 10°F |
| Plant Hardiness Zone - 2012 | Zone 7a : 0°F to 5°F |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |