Middle Valley, Tennessee has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 9.2 °C (low) to 21.6 °C (high). Annual precipitation averages 1494.3 Millimeters. Middle Valley is located in USDA Plant Hardiness Zone 8a. The growing season typically runs from the last frost around Mar. 21 - Mar. 31 through the first frost around Nov. 1 - Nov. 10.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -1.4 °C | 9.7 °C | 141.73 mm |
| February | 0.2 °C | 12.3 °C | 131.57 mm |
| March | 3.8 °C | 17 °C | 143.26 mm |
| April | 8.3 °C | 22.2 °C | 125.22 mm |
| May | 13.5 °C | 26.3 °C | 111.51 mm |
| June | 18.1 °C | 30 °C | 114.55 mm |
| July | 20.2 °C | 31.6 °C | 131.57 mm |
| August | 19.5 °C | 31.4 °C | 101.6 mm |
| September | 15.9 °C | 28.7 °C | 124.21 mm |
| October | 9.1 °C | 22.8 °C | 88.9 mm |
| November | 2.7 °C | 16.4 °C | 125.48 mm |
| December | 0.2 °C | 11.3 °C | 154.69 mm |
| Annual | 9.2 °C | 21.6 °C | 1494.29 mm |
| Average First Frost Date | Nov. 1 - Nov. 10 |
| Average Last Frost Date | Mar. 21 - Mar. 31 |
| Average Days With Frost | 50-75 Days |
| Plant Hardiness Zone | Zone 8a : -12.2°C to -9.4°C |
| Plant Hardiness Zone - 2012 | Zone 7b : -15°C to -12.2°C |
| Current Drought Conditions | Moderate Drought |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |