| 2023 Hardiness Zone: | Zone 6b: -5°F to 0°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: | 55d - Pre-Wisconsinan Drift Plains |
| Heat Zone Days: | 1 - 7 days Over 86°F |
Annual Climate Data for ZIP Code 45679 - Seaman, OH | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 20 | 23 | 32 | 41 | 51 | 60 | 64 | 62 | 55 | 44 | 35 | 26 | 43 |
| Avg Max Temp (°F) | 39 | 44 | 54 | 65 | 74 | 81 | 85 | 84 | 78 | 67 | 54 | 43 | 64 |
| Avg Precip (In.) | 2.97 | 2.82 | 3.85 | 3.86 | 4.59 | 4.13 | 4.21 | 4.23 | 3.21 | 2.71 | 3.41 | 3.28 | 43.27 |