Munising, Michigan has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 33.8 °F (low) to 50.3 °F (high). Annual precipitation averages 38.5 Inches. Munising is located in USDA Plant Hardiness Zone 5b. The growing season typically runs from the last frost around May 11 - May 20 through the first frost around Oct. 11 - Oct. 20.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 11.3 °F | 25.3 °F | 3.37 in. |
| February | 10.7 °F | 26.9 °F | 2.3 in. |
| March | 18.6 °F | 35.3 °F | 1.97 in. |
| April | 29.7 °F | 45.6 °F | 2.79 in. |
| May | 40.6 °F | 59.3 °F | 3.05 in. |
| June | 50.1 °F | 69.2 °F | 3.17 in. |
| July | 56.0 °F | 74.5 °F | 3.27 in. |
| August | 55.5 °F | 73.8 °F | 2.84 in. |
| September | 49.1 °F | 67.2 °F | 3.99 in. |
| October | 38.2 °F | 54.1 °F | 4.94 in. |
| November | 28.2 °F | 41.6 °F | 3.48 in. |
| December | 18.1 °F | 30.9 °F | 3.35 in. |
| Annual | 33.8 °F | 50.3 °F | 38.52 in. |
| Average First Frost Date | Oct. 11 - Oct. 20 |
| Average Last Frost Date | May 11 - May 20 |
| Average Days With Frost | 150-180 Days |
| Plant Hardiness Zone | Zone 5b : -15°F to -10°F |
| Plant Hardiness Zone - 2012 | Zone 5b : -15°F to -10°F |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Dfb - Humid Continental Mild Summer, Wet All Year |