| 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 1b: -15F to -10F |
| Average First Frost Date: | Oct. 11 - Oct. 20 |
| Average Last Frost Date: | May 1 - May 10 |
| Koppen-Geiger Climate Zone: | Dfa - Humid Continental Hot Summers |
| Ecoregion: | 57a - Maumee Lake Plains |
| Heat Zone Days: | Rare Over 86°F |
Annual Climate Data for ZIP Code 48160 - Milan, MI | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 15 | 17 | 26 | 36 | 47 | 56 | 60 | 58 | 50 | 39 | 31 | 21 | 38 |
| Avg Max Temp (°F) | 31 | 34 | 46 | 58 | 71 | 79 | 83 | 81 | 74 | 62 | 48 | 36 | 59 |
| Avg Precip (In.) | 1.77 | 1.67 | 2.49 | 3.19 | 3.31 | 3.6 | 3.07 | 3.53 | 3.4 | 2.46 | 2.86 | 2.52 | 33.86 |