| 2023 Hardiness Zone: | Zone 6a: -10°F to -5°F Zone 6b: -5°F to 0°F |
| 2012 Hardiness Zone: | Zone 6a: -10°F to -5°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: | Dfb - Humid Continental Mild Summer, Wet All Year |
| Ecoregion: | 57a - Maumee Lake Plains |
| Heat Zone Days: | Rare Over 86°F |
Annual Climate Data for ZIP Code 48039 - Marine City, MI | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 17 | 18 | 26 | 37 | 47 | 57 | 62 | 61 | 54 | 42 | 33 | 23 | 40 |
| Avg Max Temp (°F) | 31 | 33 | 43 | 55 | 67 | 77 | 81 | 80 | 72 | 60 | 47 | 36 | 57 |
| Avg Precip (In.) | 1.86 | 1.7 | 2.35 | 3.05 | 2.82 | 3.18 | 3.21 | 3.04 | 3.36 | 2.28 | 2.73 | 2.39 | 31.97 |