Black Mountain, North Carolina has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 7.2 °C (low) to 19.2 °C (high). Annual precipitation averages 1265.2 Millimeters. Black Mountain 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 | -2.5 °C | 8.8 °C | 104.65 mm |
| February | -0.9 °C | 10.6 °C | 84.58 mm |
| March | 2.2 °C | 14.8 °C | 107.44 mm |
| April | 6.6 °C | 19.6 °C | 108.97 mm |
| May | 10.9 °C | 23.4 °C | 114.81 mm |
| June | 15.1 °C | 26.8 °C | 117.86 mm |
| July | 17 °C | 28.4 °C | 114.3 mm |
| August | 16.4 °C | 27.7 °C | 113.79 mm |
| September | 13.3 °C | 24.8 °C | 119.13 mm |
| October | 7.4 °C | 20 °C | 85.34 mm |
| November | 1.9 °C | 15.3 °C | 89.92 mm |
| December | -0.8 °C | 10.7 °C | 104.39 mm |
| Annual | 7.2 °C | 19.2 °C | 1265.18 mm |
| Average First Frost Date | Oct. 21 - Oct. 31 |
| Average Last Frost Date | Mar. 21 - Mar. 31 |
| Average Days With Frost | 100-125 Days |
| Plant Hardiness Zone | Zone 7b : -15°C to -12.2°C |
| Plant Hardiness Zone - 2012 | Zone 7a : -17.8°C to -15°C |
| Current Drought Conditions | Moderate Drought |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |