Coal City, West Virginia has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 4.8 °C (low) to 16.2 °C (high). Annual precipitation averages 1179.8 Millimeters. Coal City is located in USDA Plant Hardiness Zone 6b. The growing season typically runs from the last frost around May 1 - May 10 through the first frost around Oct. 11 - Oct. 20.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -5.7 °C | 4.4 °C | 85.09 mm |
| February | -4.6 °C | 6.2 °C | 80.01 mm |
| March | -1.1 °C | 10.7 °C | 104.9 mm |
| April | 4.2 °C | 16.9 °C | 105.66 mm |
| May | 9.1 °C | 21.2 °C | 127.25 mm |
| June | 13.4 °C | 24.6 °C | 113.03 mm |
| July | 15.4 °C | 26.3 °C | 136.4 mm |
| August | 14.6 °C | 25.8 °C | 97.79 mm |
| September | 11.3 °C | 22.9 °C | 88.65 mm |
| October | 5.2 °C | 17.3 °C | 71.12 mm |
| November | -0.5 °C | 11.6 °C | 73.41 mm |
| December | -3.3 °C | 6.3 °C | 96.52 mm |
| Annual | 4.8 °C | 16.2 °C | 1179.83 mm |
| Average First Frost Date | Oct. 11 - Oct. 20 |
| Average Last Frost Date | May 1 - May 10 |
| Average Days With Frost | 125-150 Days |
| Plant Hardiness Zone | Zone 6b : -20.6°C to -17.8°C |
| Plant Hardiness Zone - 2012 | Zone 6a : -23.3°C to -20.6°C |
| Current Drought Conditions | Abnormally Dry |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |