| 2023 Hardiness Zone: | Zone 6b: -5°F to 0°F Zone 7a: 0°F to 5°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. 21 - Oct. 31 |
| Average Last Frost Date: | Apr. 21 - Apr. 30 |
| Koppen-Geiger Climate Zone: | Dfa - Humid Continental Hot Summers |
| Ecoregion: | 70a - Permian Hills |
| Heat Zone Days: | Rare Over 86°F |
Annual Climate Data for ZIP Code 43950 - Saint Clairsville, OH | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 19 | 20 | 29 | 38 | 48 | 57 | 61 | 60 | 53 | 41 | 33 | 24 | 40 |
| Avg Max Temp (°F) | 35 | 39 | 50 | 61 | 71 | 79 | 83 | 81 | 75 | 64 | 51 | 40 | 61 |
| Avg Precip (In.) | 2.93 | 2.54 | 3.36 | 3.45 | 4.07 | 4.26 | 4.28 | 3.8 | 3.21 | 2.49 | 3.13 | 2.85 | 40.37 |