Middleton, Tennessee has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 49.5 °F (low) to 71.6 °F (high). Annual precipitation averages 57 Inches. Middleton is located in USDA Plant Hardiness Zone 8a. 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 | 30.0 °F | 49.8 °F | 4.61 in. |
| February | 32.8 °F | 54.4 °F | 5.04 in. |
| March | 40.1 °F | 63.2 °F | 5.64 in. |
| April | 48.5 °F | 72.5 °F | 5.62 in. |
| May | 58.1 °F | 79.9 °F | 5.36 in. |
| June | 66.0 °F | 86.9 °F | 4.54 in. |
| July | 69.5 °F | 90.0 °F | 4.53 in. |
| August | 67.9 °F | 89.7 °F | 3.63 in. |
| September | 60.8 °F | 84.3 °F | 4.05 in. |
| October | 48.7 °F | 74.0 °F | 4.02 in. |
| November | 38.5 °F | 62.1 °F | 4.24 in. |
| December | 33.0 °F | 52.5 °F | 5.73 in. |
| Annual | 49.5 °F | 71.6 °F | 57.01 in. |
| Average First Frost Date | Oct. 21 - Oct. 31 |
| Average Last Frost Date | Apr. 1 - Apr. 10 |
| Average Days With Frost | 50-75 Days |
| Plant Hardiness Zone | Zone 8a : 10°F to 15°F |
| Plant Hardiness Zone - 2012 | Zone 7b : 5°F to 10°F |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |