| 2023 Hardiness Zone: | Zone 6a: -10°F to -5°F |
| 2012 Hardiness Zone: | Zone 6a: -10°F to -5°F |
| 1990 Hardiness Zone: | Zone 1b: -15F to -10F |
| Average First Frost Date: | Oct. 11 - Oct. 20 |
| Average Last Frost Date: | May 1 - May 10 |
| Koppen-Geiger Climate Zone: | Dfa - Humid Continental Hot Summers |
| Ecoregion: | 55e - Darby Plains |
| Heat Zone Days: | Rare Over 86°F |
Annual Climate Data for ZIP Code 45368 - South Charleston, OH | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 18 | 20 | 29 | 38 | 49 | 58 | 62 | 60 | 52 | 41 | 32 | 23 | 40 |
| Avg Max Temp (°F) | 34 | 38 | 50 | 61 | 72 | 80 | 84 | 82 | 76 | 64 | 51 | 39 | 61 |
| Avg Precip (In.) | 2.49 | 2.24 | 2.94 | 3.58 | 4.28 | 4.23 | 4.08 | 3.78 | 2.9 | 2.62 | 3.2 | 2.87 | 39.21 |