Whitmer, West Virginia has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 36.2 °F (low) to 58.8 °F (high). Annual precipitation averages 56.7 Inches. Whitmer is located in USDA Plant Hardiness Zone 5b. The growing season typically runs from the last frost around May 11 - May 20 through the first frost around Oct. 1 - Oct. 10.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 17.0 °F | 36.2 °F | 4.48 in. |
| February | 18.2 °F | 38.8 °F | 3.89 in. |
| March | 24.7 °F | 47.2 °F | 4.83 in. |
| April | 34.5 °F | 59.7 °F | 4.86 in. |
| May | 43.8 °F | 67.8 °F | 6.13 in. |
| June | 51.9 °F | 75.1 °F | 5.93 in. |
| July | 55.7 °F | 78.4 °F | 6.18 in. |
| August | 54.4 °F | 77.6 °F | 4.58 in. |
| September | 47.8 °F | 72.6 °F | 4.19 in. |
| October | 37.1 °F | 61.9 °F | 3.85 in. |
| November | 27.7 °F | 50.0 °F | 3.45 in. |
| December | 21.3 °F | 40.2 °F | 4.36 in. |
| Annual | 36.2 °F | 58.8 °F | 56.73 in. |
| Average First Frost Date | Oct. 1 - Oct. 10 |
| Average Last Frost Date | May 11 - May 20 |
| Average Days With Frost | 125-150 Days |
| Plant Hardiness Zone | Zone 5b : -15°F to -10°F |
| Plant Hardiness Zone - 2012 | Zone 5b : -15°F to -10°F |
| Current Drought Conditions | Moderate Drought |
| Köppen Climate Classification | Dfb - Humid Continental Mild Summer, Wet All Year |