| 2023 Hardiness Zone: | Zone 5a: -20°F to -15°F Zone 4b: -25°F to -20°F Zone 5b: -15°F to -10°F |
| 2012 Hardiness Zone: | Zone 5a: -20°F to -15°F Zone 4b: -25°F to -20°F Zone 4a: -30°F to -25°F |
| 1990 Hardiness Zone: | Zone 4b: -25F to -20F |
| Average First Frost Date: | Oct. 1 - Oct. 10 |
| Average Last Frost Date: | May 21 - May 31 |
| Koppen-Geiger Climate Zone: | Dfb - Humid Continental Mild Summer, Wet All Year |
| Ecoregion: | 50v - Winegar Dead Ice Moraine |
| Heat Zone Days: | Rare Over 86°F |
Annual Climate Data for ZIP Code 49841 - Gwinn, MI | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 4 | 7 | 16 | 28 | 40 | 49 | 54 | 53 | 45 | 35 | 24 | 11 | 31 |
| Avg Max Temp (°F) | 23 | 28 | 37 | 50 | 65 | 73 | 78 | 75 | 66 | 54 | 39 | 27 | 51 |
| Avg Precip (In.) | 1.95 | 1.32 | 2.33 | 2.67 | 3.07 | 4.01 | 3.67 | 4.1 | 3.82 | 3.12 | 2.77 | 1.97 | 34.81 |