Marshall, Michigan has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 3.9 °C (low) to 14.2 °C (high). Annual precipitation averages 963.7 Millimeters. Marshall is located in USDA Plant Hardiness Zone 6a. The growing season typically runs from the last frost around Apr. 21 - Apr. 30 through the first frost around Oct. 11 - Oct. 20.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -8.6 °C | -0.7 °C | 63.75 mm |
| February | -8.2 °C | 0.8 °C | 51.56 mm |
| March | -3.6 °C | 6.7 °C | 59.18 mm |
| April | 2.5 °C | 14.1 °C | 86.61 mm |
| May | 9.2 °C | 20.6 °C | 103.89 mm |
| June | 14.3 °C | 25.6 °C | 101.6 mm |
| July | 16.1 °C | 27.8 °C | 94.49 mm |
| August | 15.1 °C | 26.6 °C | 99.06 mm |
| September | 10.9 °C | 23.2 °C | 83.57 mm |
| October | 4.9 °C | 15.9 °C | 89.92 mm |
| November | -0.4 °C | 8.4 °C | 71.12 mm |
| December | -5.1 °C | 1.9 °C | 58.93 mm |
| Annual | 3.9 °C | 14.2 °C | 963.68 mm |
| Average First Frost Date | Oct. 11 - Oct. 20 |
| Average Last Frost Date | Apr. 21 - Apr. 30 |
| Average Days With Frost | 125-150 Days |
| Plant Hardiness Zone | Zone 6a : -23.3°C to -20.6°C |
| Plant Hardiness Zone - 2012 | Zone 5b : -26.1°C to -23.3°C |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Dfa - Humid Continental Hot Summers With Year Around Precipitation |