| 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 6b: -5F to 0F |
| 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 48126 - Dearborn, MI | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 17 | 19 | 28 | 38 | 49 | 58 | 63 | 61 | 54 | 42 | 33 | 23 | 40 |
| Avg Max Temp (°F) | 32 | 36 | 46 | 58 | 71 | 80 | 84 | 83 | 76 | 63 | 50 | 38 | 60 |
| Avg Precip (In.) | 1.95 | 1.84 | 2.57 | 3.21 | 2.93 | 3.52 | 3.15 | 3.04 | 3.41 | 2.47 | 2.73 | 2.5 | 33.34 |