| 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 11 - May 20 |
| 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 48065 - Romeo, MI | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 16 | 18 | 26 | 36 | 47 | 57 | 61 | 60 | 52 | 41 | 32 | 22 | 39 |
| Avg Max Temp (°F) | 30 | 33 | 44 | 56 | 69 | 78 | 82 | 80 | 73 | 60 | 47 | 35 | 57 |
| Avg Precip (In.) | 2.08 | 1.72 | 2.6 | 3.23 | 2.92 | 2.99 | 3.4 | 3.02 | 3.23 | 2.15 | 2.69 | 2.5 | 32.53 |