Gainesboro, Tennessee has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 46.1 °F (low) to 69.2 °F (high). Annual precipitation averages 57.7 Inches. Gainesboro 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 | 26.7 °F | 46.5 °F | 4.77 in. |
| February | 29.3 °F | 51.1 °F | 5.2 in. |
| March | 35.6 °F | 59.8 °F | 5.29 in. |
| April | 44.3 °F | 70.2 °F | 4.85 in. |
| May | 54.1 °F | 78.2 °F | 5.17 in. |
| June | 62.5 °F | 85.0 °F | 5.64 in. |
| July | 66.5 °F | 88.2 °F | 5.27 in. |
| August | 64.9 °F | 87.7 °F | 4.07 in. |
| September | 58.2 °F | 82.1 °F | 3.95 in. |
| October | 45.8 °F | 71.7 °F | 3.47 in. |
| November | 35.7 °F | 59.8 °F | 3.99 in. |
| December | 30.1 °F | 50.0 °F | 5.99 in. |
| Annual | 46.1 °F | 69.2 °F | 57.66 in. |
| Average First Frost Date | Oct. 21 - Oct. 31 |
| Average Last Frost Date | Apr. 1 - Apr. 10 |
| Average Days With Frost | 75-100 Days |
| Plant Hardiness Zone | Zone 7b : 5°F to 10°F |
| Plant Hardiness Zone - 2012 | Zone 6b : -5°F to 0°F |
| Current Drought Conditions | Moderate Drought |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |