Bartley, West Virginia has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 42.7 °F (low) to 65.4 °F (high). Annual precipitation averages 46.5 Inches. Bartley is located in USDA Plant Hardiness Zone 7a. The growing season typically runs from the last frost around Apr. 21 - Apr. 30 through the first frost around Oct. 11 - Oct. 20.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 23.4 °F | 43.1 °F | 3.53 in. |
| February | 25.7 °F | 47.1 °F | 3.3 in. |
| March | 31.4 °F | 55.5 °F | 4.16 in. |
| April | 40.4 °F | 67.5 °F | 4.28 in. |
| May | 50.3 °F | 74.7 °F | 4.75 in. |
| June | 58.9 °F | 81.2 °F | 4.47 in. |
| July | 63.0 °F | 84.3 °F | 5.1 in. |
| August | 62.0 °F | 83.3 °F | 4.02 in. |
| September | 55.1 °F | 78.2 °F | 3.37 in. |
| October | 42.7 °F | 67.5 °F | 2.87 in. |
| November | 32.3 °F | 56.1 °F | 2.81 in. |
| December | 27.1 °F | 46.4 °F | 3.81 in. |
| Annual | 42.7 °F | 65.4 °F | 46.47 in. |
| Average First Frost Date | Oct. 11 - Oct. 20 |
| Average Last Frost Date | Apr. 21 - Apr. 30 |
| Average Days With Frost | 100-125 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 | Severe Drought |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |