| 2023 Hardiness Zone: | Zone 7a: 0°F to 5°F |
| 2012 Hardiness Zone: | Zone 6b: -5°F to 0°F Zone 7a: 0°F to 5°F |
| 1990 Hardiness Zone: | Zone 6b: -5F to 0F |
| Average First Frost Date: | Oct. 21 - Oct. 31 |
| Average Last Frost Date: | Apr. 21 - Apr. 30 |
| Koppen-Geiger Climate Zone: | Cfa - Humid Subtropical Climate |
| Ecoregion: | 70b - Monongahela Transition Zone |
| Heat Zone Days: | 15 - 30 days Over 86°F |
Annual Climate Data for ZIP Code 25143 - Nitro, WV | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 22 | 24 | 32 | 40 | 49 | 59 | 64 | 62 | 56 | 43 | 34 | 27 | 43 |
| Avg Max Temp (°F) | 42 | 46 | 56 | 66 | 75 | 82 | 86 | 85 | 78 | 68 | 57 | 46 | 66 |
| Avg Precip (In.) | 3.22 | 3.03 | 3.82 | 3.38 | 4.34 | 3.95 | 4.78 | 4.14 | 3.34 | 2.78 | 3.46 | 3.4 | 43.64 |