| 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 5b: -15°F to -10°F |
| 1990 Hardiness Zone: | Zone 5a: -20F to -15F |
| Average First Frost Date: | Oct. 11 - Oct. 20 |
| Average Last Frost Date: | May 21 - May 31 |
| Koppen-Geiger Climate Zone: | Dfb - Humid Continental Mild Summer, Wet All Year |
| Ecoregion: | 50x - Grand Marais Lakeshore |
| Heat Zone Days: | Rare Over 86°F |
Annual Climate Data for ZIP Code 49862 - Munising, MI | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 9 | 11 | 19 | 30 | 40 | 48 | 54 | 54 | 48 | 38 | 27 | 16 | 33 |
| Avg Max Temp (°F) | 23 | 26 | 34 | 46 | 61 | 69 | 74 | 73 | 64 | 52 | 39 | 28 | 49 |
| Avg Precip (In.) | 3.15 | 1.93 | 2.36 | 2.04 | 2.63 | 3.11 | 3.3 | 3.25 | 3.91 | 3.66 | 3.26 | 3.33 | 35.93 |