Frank, West Virginia has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 36.1 °F (low) to 57.6 °F (high). Annual precipitation averages 44.7 Inches. Frank is located in USDA Plant Hardiness Zone 6a. 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 | 16.9 °F | 35.1 °F | 3.6 in. |
| February | 18.5 °F | 38.5 °F | 3.08 in. |
| March | 24.9 °F | 46.8 °F | 3.98 in. |
| April | 34.4 °F | 59.1 °F | 3.82 in. |
| May | 44.0 °F | 66.8 °F | 5.04 in. |
| June | 51.6 °F | 73.5 °F | 4.01 in. |
| July | 55.3 °F | 76.9 °F | 4.35 in. |
| August | 54.2 °F | 75.8 °F | 3.69 in. |
| September | 47.7 °F | 70.6 °F | 3.6 in. |
| October | 36.8 °F | 60.2 °F | 2.99 in. |
| November | 27.3 °F | 48.6 °F | 2.95 in. |
| December | 21.1 °F | 39.2 °F | 3.62 in. |
| Annual | 36.1 °F | 57.6 °F | 44.73 in. |
| Average First Frost Date | Oct. 11 - Oct. 20 |
| Average Last Frost Date | Apr. 21 - Apr. 30 |
| Average Days With Frost | 125-150 Days |
| Plant Hardiness Zone | Zone 6a : -10°F to -5°F |
| Plant Hardiness Zone - 2012 | Zone 5b : -15°F to -10°F |
| Current Drought Conditions | Abnormally Dry |
| Köppen Climate Classification | Dfb - Humid Continental Mild Summer, Wet All Year |