Boonville, North Carolina has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 7.5 °C (low) to 20.6 °C (high). Annual precipitation averages 1230.6 Millimeters. Boonville is located in USDA Plant Hardiness Zone 7b. The growing season typically runs from the last frost around Apr. 11 - Apr. 20 through the first frost around Oct. 21 - Oct. 31.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -2.9 °C | 9.3 °C | 97.28 mm |
| February | -1.9 °C | 11.4 °C | 78.99 mm |
| March | 1.6 °C | 15.7 °C | 103.89 mm |
| April | 6.4 °C | 21.2 °C | 109.22 mm |
| May | 11.7 °C | 25.2 °C | 108.97 mm |
| June | 16.4 °C | 29.1 °C | 113.54 mm |
| July | 18.7 °C | 30.8 °C | 123.19 mm |
| August | 17.9 °C | 29.9 °C | 119.13 mm |
| September | 14.3 °C | 26.7 °C | 105.92 mm |
| October | 7.3 °C | 21.6 °C | 86.11 mm |
| November | 1.5 °C | 15.7 °C | 82.8 mm |
| December | -1.6 °C | 10.8 °C | 101.6 mm |
| Annual | 7.5 °C | 20.6 °C | 1230.64 mm |
| Average First Frost Date | Oct. 21 - Oct. 31 |
| Average Last Frost Date | Apr. 11 - Apr. 20 |
| Average Days With Frost | 100-125 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 | Extreme Drought |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |