Marcellus, Michigan has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 4.5 °C (low) to 14.4 °C (high). Annual precipitation averages 1004.6 Millimeters. Marcellus 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. 11 - Oct. 20.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -8.1 °C | -0.6 °C | 71.63 mm |
| February | -7.3 °C | 1.1 °C | 53.85 mm |
| March | -3 °C | 7.1 °C | 59.94 mm |
| April | 3.2 °C | 14.2 °C | 89.15 mm |
| May | 9.6 °C | 20.6 °C | 107.44 mm |
| June | 14.7 °C | 25.7 °C | 102.87 mm |
| July | 16.7 °C | 27.9 °C | 96.52 mm |
| August | 15.7 °C | 26.9 °C | 104.39 mm |
| September | 11.5 °C | 23.5 °C | 87.12 mm |
| October | 5.3 °C | 16.1 °C | 95.25 mm |
| November | 0.1 °C | 8.6 °C | 74.17 mm |
| December | -4.8 °C | 2.1 °C | 62.23 mm |
| Annual | 4.5 °C | 14.4 °C | 1004.56 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 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 |