Marysville, Michigan has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 4.3 °C (low) to 13.7 °C (high). Annual precipitation averages 899.4 Millimeters. Marysville 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. 21 - Oct. 31.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -7.9 °C | -0.6 °C | 69.09 mm |
| February | -8 °C | 0.3 °C | 53.85 mm |
| March | -3.3 °C | 5.4 °C | 59.18 mm |
| April | 2.3 °C | 12.2 °C | 81.79 mm |
| May | 8.4 °C | 19.1 °C | 92.71 mm |
| June | 13.7 °C | 24.7 °C | 88.65 mm |
| July | 16.4 °C | 27.1 °C | 80.52 mm |
| August | 15.6 °C | 26.3 °C | 81.28 mm |
| September | 11.7 °C | 22.9 °C | 81.28 mm |
| October | 5.9 °C | 15.9 °C | 75.44 mm |
| November | 0.6 °C | 8.6 °C | 70.1 mm |
| December | -4.2 °C | 2.3 °C | 65.53 mm |
| Annual | 4.3 °C | 13.7 °C | 899.42 mm |
| Average First Frost Date | Oct. 21 - Oct. 31 |
| Average Last Frost Date | Apr. 21 - Apr. 30 |
| Average Days With Frost | 100-125 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 | Dfb - Humid Continental Mild Summer, Wet All Year |