Henderson, North Carolina has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 8.7 °C (low) to 21 °C (high). Annual precipitation averages 1188.2 Millimeters. Henderson 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 | -1.7 °C | 9.8 °C | 95.5 mm |
| February | -0.8 °C | 11.8 °C | 75.18 mm |
| March | 2.7 °C | 15.9 °C | 107.19 mm |
| April | 7.9 °C | 21.6 °C | 99.57 mm |
| May | 12.9 °C | 25.4 °C | 92.71 mm |
| June | 17.6 °C | 29.6 °C | 111.76 mm |
| July | 19.8 °C | 31.4 °C | 114.55 mm |
| August | 18.9 °C | 30.3 °C | 101.09 mm |
| September | 15.4 °C | 27.1 °C | 124.97 mm |
| October | 8.7 °C | 21.6 °C | 89.66 mm |
| November | 2.9 °C | 16.1 °C | 84.33 mm |
| December | -0.1 °C | 11.4 °C | 91.69 mm |
| Annual | 8.7 °C | 21 °C | 1188.2 mm |
| Average First Frost Date | Oct. 21 - Oct. 31 |
| Average Last Frost Date | Apr. 11 - Apr. 20 |
| Average Days With Frost | 75-100 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 | Extreme Drought |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |