| 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 1b: -15F to -10F |
| Average First Frost Date: | Oct. 21 - Oct. 31 |
| Average Last Frost Date: | May 1 - May 10 |
| Koppen-Geiger Climate Zone: | Dfa - Humid Continental Hot Summers |
| Ecoregion: | 83a - Erie Lake Plain |
| Heat Zone Days: | Rare Over 86°F |
Annual Climate Data for ZIP Code 44846 - Milan, OH | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 17 | 19 | 28 | 37 | 48 | 58 | 62 | 60 | 53 | 42 | 33 | 23 | 40 |
| Avg Max Temp (°F) | 33 | 36 | 46 | 58 | 69 | 79 | 83 | 81 | 74 | 62 | 49 | 37 | 59 |
| Avg Precip (In.) | 2.17 | 1.83 | 2.69 | 3.28 | 3.57 | 4.22 | 3.87 | 3.86 | 3.22 | 2.35 | 2.92 | 2.75 | 36.75 |