Charleston, West Virginia has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 43.6 °F (low) to 67 °F (high). Annual precipitation averages 44.5 Inches. Charleston 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 | 23.6 °F | 43.4 °F | 3.12 in. |
| February | 25.5 °F | 47.2 °F | 2.95 in. |
| March | 31.8 °F | 56.4 °F | 3.95 in. |
| April | 41.3 °F | 68.9 °F | 3.53 in. |
| May | 51.7 °F | 76.6 °F | 4.76 in. |
| June | 60.3 °F | 83.5 °F | 4.03 in. |
| July | 64.4 °F | 86.7 °F | 5.63 in. |
| August | 63.2 °F | 85.8 °F | 3.88 in. |
| September | 56.3 °F | 80.6 °F | 3.34 in. |
| October | 44.1 °F | 69.6 °F | 2.98 in. |
| November | 33.0 °F | 57.4 °F | 2.75 in. |
| December | 27.8 °F | 47.3 °F | 3.56 in. |
| Annual | 43.6 °F | 67 °F | 44.48 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 | Moderate Drought |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |