Powells Crossroads, Tennessee has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 9.4 °C (low) to 21.7 °C (high). Annual precipitation averages 1479.3 Millimeters. Powells Crossroads 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 | -1.2 °C | 9.8 °C | 125.22 mm |
| February | 0.6 °C | 12.3 °C | 132.33 mm |
| March | 4.1 °C | 17.1 °C | 135.38 mm |
| April | 8.4 °C | 22.4 °C | 127.76 mm |
| May | 13.6 °C | 26.2 °C | 107.7 mm |
| June | 18.1 °C | 29.8 °C | 141.73 mm |
| July | 20.2 °C | 31.4 °C | 126.24 mm |
| August | 19.7 °C | 31.4 °C | 100.84 mm |
| September | 16.1 °C | 28.7 °C | 104.14 mm |
| October | 9.2 °C | 22.8 °C | 87.88 mm |
| November | 3.2 °C | 16.4 °C | 130.05 mm |
| December | 0.4 °C | 11.5 °C | 160.02 mm |
| Annual | 9.4 °C | 21.7 °C | 1479.29 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 | Abnormally Dry |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |