| 2023 Hardiness Zone: | Zone 6b: -5°F to 0°F |
| 2012 Hardiness Zone: | Zone 6a: -10°F to -5°F Zone 6b: -5°F to 0°F |
| 1990 Hardiness Zone: | Zone 6a: -10F to -5F |
| Average First Frost Date: | Oct. 11 - Oct. 20 |
| Average Last Frost Date: | May 11 - May 20 |
| Koppen-Geiger Climate Zone: | Dfa - Humid Continental Hot Summers |
| Ecoregion: | 70b - Monongahela Transition Zone |
| Heat Zone Days: | 15 - 30 days Over 86°F |
Annual Climate Data for ZIP Code 26147 - Grantsville, WV | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 19 | 21 | 29 | 37 | 47 | 57 | 62 | 60 | 53 | 39 | 32 | 24 | 40 |
| Avg Max Temp (°F) | 41 | 45 | 56 | 66 | 75 | 82 | 86 | 84 | 79 | 67 | 56 | 46 | 65 |
| Avg Precip (In.) | 3.94 | 3.29 | 4.07 | 3.26 | 4.19 | 4.23 | 4.7 | 4.38 | 3.46 | 2.63 | 3.01 | 3.32 | 44.49 |