Friendly, West Virginia has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 41.3 °F (low) to 63.9 °F (high). Annual precipitation averages 46.7 Inches. Friendly is located in USDA Plant Hardiness Zone 6b. The growing season typically runs from the last frost around Apr. 21 - Apr. 30 through the first frost around Oct. 21 - Oct. 31.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 20.8 °F | 39.3 °F | 3.5 in. |
| February | 22.3 °F | 42.8 °F | 3.12 in. |
| March | 29.2 °F | 52.3 °F | 4.02 in. |
| April | 39.1 °F | 65.9 °F | 4.0 in. |
| May | 49.3 °F | 74.1 °F | 4.85 in. |
| June | 58.4 °F | 81.6 °F | 4.7 in. |
| July | 62.8 °F | 84.9 °F | 4.96 in. |
| August | 61.4 °F | 84.1 °F | 3.97 in. |
| September | 54.0 °F | 78.2 °F | 3.59 in. |
| October | 41.6 °F | 66.4 °F | 3.15 in. |
| November | 31.6 °F | 54.2 °F | 3.28 in. |
| December | 25.6 °F | 43.5 °F | 3.55 in. |
| Annual | 41.3 °F | 63.9 °F | 46.69 in. |
| Average First Frost Date | Oct. 21 - Oct. 31 |
| Average Last Frost Date | Apr. 21 - Apr. 30 |
| Average Days With Frost | 100-125 Days |
| Plant Hardiness Zone | Zone 6b : -5°F to 0°F |
| Plant Hardiness Zone - 2012 | Zone 6a : -10°F to -5°F |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Dfa - Humid Continental Hot Summers With Year Around Precipitation |