| 2023 Hardiness Zone: | Zone 5a: -20°F to -15°F Zone 4b: -25°F to -20°F Zone 6a: -10°F to -5°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 6a: -10°F to -5°F Zone 5b: -15°F to -10°F |
| 1990 Hardiness Zone: | Zone 1b: -15F to -10F |
| Average First Frost Date: | Oct. 21 - Oct. 31 |
| Average Last Frost Date: | May 11 - May 20 |
| Koppen-Geiger Climate Zone: | Dfb - Humid Continental Mild Summer, Wet All Year |
| Ecoregion: | 50w - Michigamme Highland |
| Heat Zone Days: | Rare Over 86°F |
Annual Climate Data for ZIP Code 49855 - Marquette, MI | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 10 | 13 | 22 | 32 | 42 | 51 | 57 | 57 | 49 | 39 | 28 | 17 | 35 |
| Avg Max Temp (°F) | 25 | 29 | 37 | 48 | 61 | 70 | 76 | 74 | 66 | 55 | 40 | 29 | 51 |
| Avg Precip (In.) | 2.05 | 1.38 | 2.28 | 2.38 | 2.67 | 2.76 | 2.66 | 3.04 | 3.48 | 3.07 | 2.62 | 1.97 | 30.32 |