| 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 5a: -20F to -15F |
| 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 44460 - Salem, OH | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 17 | 18 | 26 | 35 | 46 | 55 | 59 | 57 | 50 | 39 | 31 | 23 | 38 |
| Avg Max Temp (°F) | 34 | 38 | 48 | 60 | 70 | 79 | 83 | 81 | 74 | 62 | 50 | 39 | 60 |
| Avg Precip (In.) | 2.29 | 2 | 2.97 | 3.24 | 3.76 | 4.05 | 4.16 | 3.5 | 3.62 | 2.57 | 3.1 | 2.8 | 38.06 |