Mulliken, Michigan has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 3.5 °C (low) to 14 °C (high). Annual precipitation averages 908.1 Millimeters. Mulliken is located in USDA Plant Hardiness Zone 6a. The growing season typically runs from the last frost around May 1 - May 10 through the first frost around Oct. 1 - Oct. 10.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -8.9 °C | -1.2 °C | 58.93 mm |
| February | -8.6 °C | 0.5 °C | 51.05 mm |
| March | -4.1 °C | 6.3 °C | 56.64 mm |
| April | 1.9 °C | 13.7 °C | 89.66 mm |
| May | 8.5 °C | 20.5 °C | 98.81 mm |
| June | 13.7 °C | 25.6 °C | 95 mm |
| July | 15.6 °C | 27.6 °C | 83.57 mm |
| August | 14.7 °C | 26.6 °C | 91.69 mm |
| September | 10.4 °C | 23.1 °C | 74.17 mm |
| October | 4.4 °C | 15.7 °C | 85.85 mm |
| November | -0.8 °C | 8.1 °C | 67.56 mm |
| December | -5.3 °C | 1.7 °C | 55.12 mm |
| Annual | 3.5 °C | 14 °C | 908.05 mm |
| Average First Frost Date | Oct. 1 - Oct. 10 |
| Average Last Frost Date | May 1 - May 10 |
| Average Days With Frost | 125-150 Days |
| Plant Hardiness Zone | Zone 6a : -23.3°C to -20.6°C |
| Plant Hardiness Zone - 2012 | Zone 6a : -23.3°C to -20.6°C |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Dfa - Humid Continental Hot Summers With Year Around Precipitation |