Hickory Valley, Tennessee has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 9.4 °C (low) to 21.9 °C (high). Annual precipitation averages 1436.6 Millimeters. Hickory Valley is located in USDA Plant Hardiness Zone 7b. The growing season typically runs from the last frost around Mar. 21 - Mar. 31 through the first frost around Oct. 21 - Oct. 31.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -1.4 °C | 9.7 °C | 114.3 mm |
| February | 0.2 °C | 12.3 °C | 125.22 mm |
| March | 4.1 °C | 17.1 °C | 144.53 mm |
| April | 8.8 °C | 22.3 °C | 143.26 mm |
| May | 14.2 °C | 26.4 °C | 136.4 mm |
| June | 18.6 °C | 30.5 °C | 117.09 mm |
| July | 20.5 °C | 32.1 °C | 116.59 mm |
| August | 19.6 °C | 32.1 °C | 86.36 mm |
| September | 15.7 °C | 29.1 °C | 101.85 mm |
| October | 9 °C | 23.4 °C | 104.14 mm |
| November | 3.5 °C | 16.6 °C | 103.89 mm |
| December | 0.3 °C | 11.2 °C | 143 mm |
| Annual | 9.4 °C | 21.9 °C | 1436.63 mm |
| Average First Frost Date | Oct. 21 - Oct. 31 |
| Average Last Frost Date | Mar. 21 - Mar. 31 |
| Average Days With Frost | 50-75 Days |
| Plant Hardiness Zone | Zone 7b : -15°C to -12.2°C |
| Plant Hardiness Zone - 2012 | Zone 7b : -15°C to -12.2°C |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |