| 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 11 - May 20 |
| Koppen-Geiger Climate Zone: | Dfb - Humid Continental Mild Summer, Wet All Year |
| Ecoregion: | 61c - Low Lime Drift Plain |
| Heat Zone Days: | Rare Over 86°F |
Annual Climate Data for ZIP Code 44287 - West Salem, OH | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 16 | 18 | 27 | 36 | 47 | 56 | 60 | 58 | 51 | 40 | 32 | 22 | 39 |
| Avg Max Temp (°F) | 32 | 36 | 46 | 58 | 69 | 78 | 82 | 80 | 73 | 62 | 49 | 37 | 59 |
| Avg Precip (In.) | 2.37 | 2.1 | 2.89 | 3.44 | 4 | 3.95 | 4.02 | 3.96 | 3.48 | 2.5 | 3.19 | 2.82 | 38.71 |