| 2023 Hardiness Zone: | Zone 7a: 0°F to 5°F |
| 2012 Hardiness Zone: | Zone 6b: -5°F to 0°F |
| 1990 Hardiness Zone: | Zone 6b: -5F to 0F |
| Average First Frost Date: | Oct. 21 - Oct. 31 |
| Average Last Frost Date: | May 1 - May 10 |
| Koppen-Geiger Climate Zone: | Cfa - Humid Subtropical Climate |
| Ecoregion: | 70b - Monongahela Transition Zone |
| Heat Zone Days: | 8 - 14 days Over 86°F |
Annual Climate Data for ZIP Code 25309 - South Charleston, WV | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 23 | 24 | 32 | 41 | 50 | 59 | 64 | 62 | 56 | 43 | 34 | 27 | 43 |
| Avg Max Temp (°F) | 43 | 46 | 56 | 67 | 75 | 82 | 86 | 84 | 79 | 69 | 57 | 47 | 66 |
| Avg Precip (In.) | 3.31 | 3.13 | 3.85 | 3.33 | 4.36 | 4.09 | 4.88 | 4.15 | 3.34 | 2.76 | 3.52 | 3.43 | 44.16 |