Muskegon, Michigan has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 4.5 °C (low) to 13.2 °C (high). Annual precipitation averages 907.8 Millimeters. 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 | -7.2 °C | -0.7 °C | 67.82 mm |
| February | -7.1 °C | 0.5 °C | 50.04 mm |
| March | -3.4 °C | 5.6 °C | 55.37 mm |
| April | 2.4 °C | 12.2 °C | 92.2 mm |
| May | 8.6 °C | 18.7 °C | 85.85 mm |
| June | 13.8 °C | 23.7 °C | 85.09 mm |
| July | 16.3 °C | 26 °C | 73.15 mm |
| August | 15.8 °C | 25.4 °C | 81.28 mm |
| September | 11.6 °C | 21.9 °C | 82.04 mm |
| October | 5.8 °C | 15.1 °C | 94.74 mm |
| November | 0.6 °C | 8.1 °C | 76.45 mm |
| December | -3.8 °C | 2.2 °C | 63.75 mm |
| Annual | 4.5 °C | 13.2 °C | 907.78 mm |
| 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 : -20.6°C to -17.8°C |
| Plant Hardiness Zone - 2012 | Zone 6a : -23.3°C to -20.6°C |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Dfb - Humid Continental Mild Summer, Wet All Year |