| 2023 Hardiness Zone: | Zone 5b: -15°F to -10°F |
| 2012 Hardiness Zone: | Zone 5a: -20°F to -15°F Zone 5b: -15°F to -10°F |
| 1990 Hardiness Zone: | Zone 5a: -20F to -15F |
| Average First Frost Date: | Sep. 21 - Sep. 30 |
| Average Last Frost Date: | Jun. 1 - Jun. 10 |
| Koppen-Geiger Climate Zone: | Dfb - Humid Continental Mild Summer, Wet All Year |
| Ecoregion: | 50ab - Cheboygan Lake Plain |
| Heat Zone Days: | Rare Over 86°F |
Annual Climate Data for ZIP Code 49701 - Mackinaw City, MI | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 11 | 11 | 19 | 31 | 42 | 52 | 59 | 59 | 50 | 39 | 30 | 19 | 35 |
| Avg Max Temp (°F) | 25 | 27 | 35 | 46 | 59 | 69 | 76 | 74 | 65 | 53 | 41 | 31 | 50 |
| Avg Precip (In.) | 1.83 | 1.25 | 1.96 | 2.38 | 2.57 | 2.55 | 2.74 | 3.24 | 3.52 | 2.88 | 2.44 | 2.07 | 29.43 |