Jonesborough, Tennessee has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 45.1 °F (low) to 68 °F (high). Annual precipitation averages 46.6 Inches. Jonesborough is located in USDA Plant Hardiness Zone 7a. The growing season typically runs from the last frost around Apr. 21 - Apr. 30 through the first frost around Oct. 21 - Oct. 31.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 26.6 °F | 46.7 °F | 3.61 in. |
| February | 29.1 °F | 50.8 °F | 3.75 in. |
| March | 35.4 °F | 59.5 °F | 4.13 in. |
| April | 43.5 °F | 69.6 °F | 4.2 in. |
| May | 52.5 °F | 76.7 °F | 4.19 in. |
| June | 60.5 °F | 82.7 °F | 4.19 in. |
| July | 64.1 °F | 85.5 °F | 5.24 in. |
| August | 63.0 °F | 84.8 °F | 4.39 in. |
| September | 56.9 °F | 80.3 °F | 3.06 in. |
| October | 45.1 °F | 70.5 °F | 2.59 in. |
| November | 35.0 °F | 59.3 °F | 3.07 in. |
| December | 29.7 °F | 49.9 °F | 4.13 in. |
| Annual | 45.1 °F | 68 °F | 46.55 in. |
| Average First Frost Date | Oct. 21 - Oct. 31 |
| Average Last Frost Date | Apr. 21 - Apr. 30 |
| Average Days With Frost | 75-100 Days |
| Plant Hardiness Zone | Zone 7a : 0°F to 5°F |
| Plant Hardiness Zone - 2012 | Zone 7a : 0°F to 5°F |
| Current Drought Conditions | Severe Drought |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |