| 2023 Hardiness Zone: | Zone 6a: -10°F to -5°F Zone 5a: -20°F to -15°F 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 1b: -15F to -10F |
| 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: | 50d - Ontonagon Lobe Moraines and Gogebic Iron Range |
| Heat Zone Days: | Rare Over 86°F |
Annual Climate Data for ZIP Code 49913 - Calumet, MI | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 7 | 9 | 17 | 29 | 41 | 49 | 55 | 54 | 46 | 36 | 25 | 13 | 32 |
| Avg Max Temp (°F) | 21 | 25 | 34 | 48 | 63 | 71 | 76 | 74 | 64 | 52 | 37 | 26 | 49 |
| Avg Precip (In.) | 4.31 | 2.31 | 2.5 | 1.95 | 2.76 | 3.16 | 3.25 | 3.16 | 3.43 | 2.82 | 2.94 | 3.5 | 36.09 |