Sylvester, West Virginia has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 44.4 °F (low) to 66.6 °F (high). Annual precipitation averages 48.5 Inches. Sylvester is located in USDA Plant Hardiness Zone 7a. 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 | 24.5 °F | 43.3 °F | 3.54 in. |
| February | 26.7 °F | 47.1 °F | 3.34 in. |
| March | 32.8 °F | 56.1 °F | 4.36 in. |
| April | 42.4 °F | 68.7 °F | 4.22 in. |
| May | 52.3 °F | 76.1 °F | 5.1 in. |
| June | 60.9 °F | 83.1 °F | 4.62 in. |
| July | 64.9 °F | 86.1 °F | 5.64 in. |
| August | 63.9 °F | 85.2 °F | 4.15 in. |
| September | 56.9 °F | 80.1 °F | 3.46 in. |
| October | 44.7 °F | 69.0 °F | 3.01 in. |
| November | 33.9 °F | 57.1 °F | 3.06 in. |
| December | 28.6 °F | 47.0 °F | 4.01 in. |
| Annual | 44.4 °F | 66.6 °F | 48.51 in. |
| 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 7a : 0°F to 5°F |
| Plant Hardiness Zone - 2012 | Zone 6b : -5°F to 0°F |
| Current Drought Conditions | Moderate Drought |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |