Winfield, Tennessee has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 44.2 °F (low) to 67 °F (high). Annual precipitation averages 57.6 Inches. Winfield is located in USDA Plant Hardiness Zone 7a. 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 | 25.3 °F | 44.9 °F | 4.7 in. |
| February | 27.5 °F | 48.9 °F | 4.97 in. |
| March | 33.9 °F | 57.7 °F | 5.67 in. |
| April | 42.6 °F | 68.4 °F | 5.17 in. |
| May | 52.4 °F | 76.0 °F | 4.89 in. |
| June | 60.0 °F | 82.7 °F | 5.09 in. |
| July | 64.1 °F | 85.5 °F | 5.97 in. |
| August | 62.7 °F | 84.8 °F | 4.19 in. |
| September | 55.9 °F | 79.7 °F | 3.93 in. |
| October | 43.6 °F | 69.6 °F | 3.28 in. |
| November | 33.6 °F | 57.7 °F | 3.94 in. |
| December | 28.8 °F | 48.4 °F | 5.8 in. |
| Annual | 44.2 °F | 67 °F | 57.6 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 7a : 0°F to 5°F |
| Plant Hardiness Zone - 2012 | Zone 6b : -5°F to 0°F |
| Current Drought Conditions | Severe Drought |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |