| 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 5b: -15°F to -10°F |
| 1990 Hardiness Zone: | Zone 4b: -25F to -20F |
| Average First Frost Date: | Oct. 1 - Oct. 10 |
| Average Last Frost Date: | Jun. 1 - Jun. 10 |
| 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 49866 - Negaunee, 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 | 52 | 45 | 35 | 23 | 11 | 30 |
| Avg Max Temp (°F) | 21 | 27 | 36 | 49 | 64 | 72 | 77 | 75 | 65 | 53 | 37 | 26 | 50 |
| Avg Precip (In.) | 2.43 | 1.73 | 2.98 | 2.73 | 3.04 | 3.27 | 3.18 | 3.55 | 3.74 | 3.54 | 3.13 | 2.3 | 35.61 |