Jefferson City, Tennessee has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 47.4 °F (low) to 69 °F (high). Annual precipitation averages 48.4 Inches. Jefferson City 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 | 28.3 °F | 47.0 °F | 4.33 in. |
| February | 31.2 °F | 51.5 °F | 4.39 in. |
| March | 37.4 °F | 60.4 °F | 4.59 in. |
| April | 45.8 °F | 69.7 °F | 4.52 in. |
| May | 55.1 °F | 77.7 °F | 3.91 in. |
| June | 63.4 °F | 84.5 °F | 4.16 in. |
| July | 67.1 °F | 87.4 °F | 4.58 in. |
| August | 65.8 °F | 86.9 °F | 3.36 in. |
| September | 59.5 °F | 82.0 °F | 3.12 in. |
| October | 47.4 °F | 71.5 °F | 2.78 in. |
| November | 36.6 °F | 59.5 °F | 3.64 in. |
| December | 31.4 °F | 50.2 °F | 4.98 in. |
| Annual | 47.4 °F | 69 °F | 48.36 in. |
| Average First Frost Date | Oct. 21 - Oct. 31 |
| Average Last Frost Date | Apr. 11 - Apr. 20 |
| Average Days With Frost | 50-75 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 | Abnormally Dry |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |