Muskegon, Michigan has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 40 °F (low) to 55.8 °F (high). Annual precipitation averages 35.7 Inches. Muskegon is located in USDA Plant Hardiness Zone 6b. The growing season typically runs from the last frost around May 1 - May 10 through the first frost around Oct. 11 - Oct. 20.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 19.0 °F | 30.8 °F | 2.67 in. |
| February | 19.2 °F | 32.9 °F | 1.97 in. |
| March | 25.8 °F | 42.0 °F | 2.18 in. |
| April | 36.3 °F | 54.0 °F | 3.63 in. |
| May | 47.4 °F | 65.7 °F | 3.38 in. |
| June | 56.9 °F | 74.7 °F | 3.35 in. |
| July | 61.4 °F | 78.8 °F | 2.88 in. |
| August | 60.4 °F | 77.8 °F | 3.2 in. |
| September | 52.9 °F | 71.4 °F | 3.23 in. |
| October | 42.4 °F | 59.1 °F | 3.73 in. |
| November | 33.0 °F | 46.5 °F | 3.01 in. |
| December | 25.1 °F | 35.9 °F | 2.51 in. |
| Annual | 40 °F | 55.8 °F | 35.74 in. |
| Average First Frost Date | Oct. 11 - Oct. 20 |
| Average Last Frost Date | May 1 - May 10 |
| Average Days With Frost | 125-150 Days |
| Plant Hardiness Zone | Zone 6b : -5°F to 0°F |
| Plant Hardiness Zone - 2012 | Zone 6a : -10°F to -5°F |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Dfb - Humid Continental Mild Summer, Wet All Year |