Dunbar, West Virginia has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 43.5 °F (low) to 66.7 °F (high). Annual precipitation averages 46.1 Inches. Dunbar 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 | 43.1 °F | 3.21 in. |
| February | 25.5 °F | 46.9 °F | 3.12 in. |
| March | 31.7 °F | 56.1 °F | 4.0 in. |
| April | 41.3 °F | 68.7 °F | 3.89 in. |
| May | 51.6 °F | 76.4 °F | 5.02 in. |
| June | 60.1 °F | 83.3 °F | 4.33 in. |
| July | 64.5 °F | 86.7 °F | 5.76 in. |
| August | 63.0 °F | 85.6 °F | 3.64 in. |
| September | 56.0 °F | 80.2 °F | 3.31 in. |
| October | 43.9 °F | 69.1 °F | 3.09 in. |
| November | 33.0 °F | 57.1 °F | 2.9 in. |
| December | 27.7 °F | 46.9 °F | 3.8 in. |
| Annual | 43.5 °F | 66.7 °F | 46.07 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 |