| 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 |
| 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: | Dfb - Humid Continental Mild Summer, Wet All Year |
| Ecoregion: | 70e - Unglaciated Upper Muskingum Basin |
| Heat Zone Days: | 1 - 7 days Over 86°F |
Annual Climate Data for ZIP Code 44612 - Bolivar, OH | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 18 | 20 | 28 | 37 | 48 | 57 | 61 | 59 | 52 | 41 | 33 | 24 | 40 |
| Avg Max Temp (°F) | 34 | 38 | 49 | 60 | 71 | 79 | 83 | 82 | 75 | 63 | 50 | 39 | 60 |
| Avg Precip (In.) | 2.45 | 2.25 | 3.08 | 3.26 | 3.78 | 4.02 | 4.12 | 3.99 | 3.28 | 2.47 | 3.07 | 2.83 | 38.59 |