Waynesboro, Tennessee has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 46.7 °F (low) to 70.4 °F (high). Annual precipitation averages 60.4 Inches. Waynesboro is located in USDA Plant Hardiness Zone 7b. 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 | 27.5 °F | 48.6 °F | 5.13 in. |
| February | 30.4 °F | 53.6 °F | 5.43 in. |
| March | 36.6 °F | 61.8 °F | 5.41 in. |
| April | 45.1 °F | 71.8 °F | 5.71 in. |
| May | 54.7 °F | 78.6 °F | 5.41 in. |
| June | 63.0 °F | 85.1 °F | 4.96 in. |
| July | 66.7 °F | 88.5 °F | 5.4 in. |
| August | 65.3 °F | 88.1 °F | 4.38 in. |
| September | 58.5 °F | 83.2 °F | 4.26 in. |
| October | 45.7 °F | 73.1 °F | 4.0 in. |
| November | 35.9 °F | 60.9 °F | 4.17 in. |
| December | 30.6 °F | 51.5 °F | 6.17 in. |
| Annual | 46.7 °F | 70.4 °F | 60.43 in. |
| Average First Frost Date | Oct. 21 - Oct. 31 |
| Average Last Frost Date | Apr. 11 - Apr. 20 |
| Average Days With Frost | 75-100 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 | Moderate Drought |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |