| 2023 Hardiness Zone: | Zone 6a: -10°F to -5°F Zone 6b: -5°F to 0°F |
| 2012 Hardiness Zone: | Zone 6a: -10°F to -5°F Zone 5b: -15°F to -10°F |
| 1990 Hardiness Zone: | Zone 6a: -10F to -5F |
| Average First Frost Date: | Oct. 11 - Oct. 20 |
| Average Last Frost Date: | May 1 - May 10 |
| Koppen-Geiger Climate Zone: | Dfb - Humid Continental Mild Summer, Wet All Year |
| Ecoregion: | 70a - Permian Hills |
| Heat Zone Days: | 1 - 7 days Over 86°F |
Annual Climate Data for ZIP Code 26582 - Mannington, WV | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 18 | 20 | 28 | 36 | 45 | 55 | 59 | 58 | 51 | 38 | 31 | 24 | 39 |
| Avg Max Temp (°F) | 39 | 42 | 54 | 65 | 75 | 82 | 84 | 83 | 77 | 67 | 53 | 44 | 64 |
| Avg Precip (In.) | 3.6 | 3.16 | 4.09 | 3.7 | 4.59 | 4.43 | 4.87 | 4.27 | 3.54 | 2.92 | 3.62 | 3.48 | 46.26 |