Leon, West Virginia has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 6 °C (low) to 18.7 °C (high). Annual precipitation averages 1122.7 Millimeters. Leon is located in USDA Plant Hardiness Zone 6b. The growing season typically runs from the last frost around Apr. 11 - Apr. 20 through the first frost around Oct. 21 - Oct. 31.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -5.1 °C | 5.4 °C | 77.47 mm |
| February | -3.9 °C | 7.6 °C | 74.17 mm |
| March | -0.6 °C | 12.7 °C | 97.03 mm |
| April | 4.7 °C | 19.7 °C | 87.63 mm |
| May | 10.6 °C | 24.2 °C | 117.35 mm |
| June | 15.3 °C | 28.1 °C | 113.28 mm |
| July | 17.6 °C | 30 °C | 125.73 mm |
| August | 16.8 °C | 29.4 °C | 93.22 mm |
| September | 12.8 °C | 26.3 °C | 95.5 mm |
| October | 6.1 °C | 19.9 °C | 75.69 mm |
| November | 0.3 °C | 13.4 °C | 74.93 mm |
| December | -2.7 °C | 7.6 °C | 90.68 mm |
| Annual | 6 °C | 18.7 °C | 1122.68 mm |
| Average First Frost Date | Oct. 21 - Oct. 31 |
| Average Last Frost Date | Apr. 11 - Apr. 20 |
| Average Days With Frost | 75-100 Days |
| Plant Hardiness Zone | Zone 6b : -20.6°C to -17.8°C |
| Plant Hardiness Zone - 2012 | Zone 6b : -20.6°C to -17.8°C |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |