Winchester, Virginia has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 43.3 °F (low) to 64.7 °F (high). Annual precipitation averages 40.6 Inches. Winchester is located in USDA Plant Hardiness Zone 7a. 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 | 23.3 °F | 41.7 °F | 2.67 in. |
| February | 25.2 °F | 45.1 °F | 2.27 in. |
| March | 31.6 °F | 53.2 °F | 3.38 in. |
| April | 41.4 °F | 65.2 °F | 3.35 in. |
| May | 51.2 °F | 73.5 °F | 4.13 in. |
| June | 59.7 °F | 81.9 °F | 4.01 in. |
| July | 64.2 °F | 86.4 °F | 4.04 in. |
| August | 62.3 °F | 84.7 °F | 3.34 in. |
| September | 55.3 °F | 77.9 °F | 4.43 in. |
| October | 43.8 °F | 66.7 °F | 3.12 in. |
| November | 34.3 °F | 55.1 °F | 2.83 in. |
| December | 27.2 °F | 45.3 °F | 3.0 in. |
| Annual | 43.3 °F | 64.7 °F | 40.57 in. |
| Average First Frost Date | Oct. 21 - Oct. 31 |
| Average Last Frost Date | Apr. 1 - Apr. 10 |
| Average Days With Frost | 100-125 Days |
| Plant Hardiness Zone | Zone 7a : 0°F to 5°F |
| Plant Hardiness Zone - 2012 | Zone 6b : -5°F to 0°F |
| Current Drought Conditions | Moderate Drought |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |