Powellsville, North Carolina has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 9.7 °C (low) to 21.6 °C (high). Annual precipitation averages 1278.6 Millimeters. Powellsville 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 | -0.7 °C | 10.7 °C | 94.23 mm |
| February | 0.3 °C | 12.5 °C | 76.96 mm |
| March | 3.7 °C | 16.4 °C | 103.63 mm |
| April | 9 °C | 22 °C | 90.42 mm |
| May | 13.9 °C | 25.7 °C | 95 mm |
| June | 18.5 °C | 29.8 °C | 124.97 mm |
| July | 20.7 °C | 31.6 °C | 139.95 mm |
| August | 19.9 °C | 30.8 °C | 137.41 mm |
| September | 16.7 °C | 27.8 °C | 149.35 mm |
| October | 9.9 °C | 22.6 °C | 95.76 mm |
| November | 4.1 °C | 17.1 °C | 83.57 mm |
| December | 0.9 °C | 12.6 °C | 87.38 mm |
| Annual | 9.7 °C | 21.6 °C | 1278.63 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 |