Henderson, West Virginia has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 43.4 °F (low) to 66 °F (high). Annual precipitation averages 43.5 Inches. Henderson is located in USDA Plant Hardiness Zone 7a. 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 | 23.3 °F | 41.7 °F | 3.23 in. |
| February | 25.2 °F | 45.4 °F | 2.98 in. |
| March | 31.3 °F | 54.9 °F | 3.96 in. |
| April | 41.0 °F | 67.9 °F | 3.6 in. |
| May | 51.9 °F | 76.0 °F | 4.54 in. |
| June | 60.3 °F | 83.3 °F | 4.28 in. |
| July | 64.6 °F | 86.6 °F | 4.6 in. |
| August | 62.9 °F | 85.7 °F | 3.6 in. |
| September | 55.7 °F | 80.0 °F | 3.47 in. |
| October | 43.6 °F | 68.4 °F | 3.03 in. |
| November | 33.4 °F | 56.3 °F | 2.76 in. |
| December | 27.7 °F | 45.7 °F | 3.43 in. |
| Annual | 43.4 °F | 66 °F | 43.48 in. |
| 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 7a : 0°F to 5°F |
| Plant Hardiness Zone - 2012 | Zone 6b : -5°F to 0°F |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |