| 2023 Hardiness Zone: | Zone 6a: -10°F to -5°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 44062 - Middlefield, OH | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 15 | 17 | 25 | 35 | 46 | 55 | 59 | 58 | 51 | 40 | 32 | 22 | 38 |
| Avg Max Temp (°F) | 32 | 35 | 45 | 57 | 68 | 77 | 81 | 79 | 72 | 61 | 48 | 37 | 58 |
| Avg Precip (In.) | 2.82 | 2.43 | 3.22 | 3.6 | 3.9 | 4.27 | 3.96 | 4.1 | 4.21 | 3.4 | 3.79 | 3.66 | 43.35 |