Marysville, Michigan has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 39.7 °F (low) to 56.7 °F (high). Annual precipitation averages 35.4 Inches. 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 | 17.7 °F | 30.9 °F | 2.72 in. |
| February | 17.6 °F | 32.6 °F | 2.12 in. |
| March | 26.0 °F | 41.8 °F | 2.33 in. |
| April | 36.1 °F | 54.0 °F | 3.22 in. |
| May | 47.2 °F | 66.3 °F | 3.65 in. |
| June | 56.6 °F | 76.5 °F | 3.49 in. |
| July | 61.5 °F | 80.7 °F | 3.17 in. |
| August | 60.1 °F | 79.3 °F | 3.2 in. |
| September | 53.0 °F | 73.3 °F | 3.2 in. |
| October | 42.7 °F | 60.7 °F | 2.97 in. |
| November | 33.0 °F | 47.5 °F | 2.76 in. |
| December | 24.4 °F | 36.2 °F | 2.58 in. |
| Annual | 39.7 °F | 56.7 °F | 35.41 in. |
| 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 : -10°F to -5°F |
| Plant Hardiness Zone - 2012 | Zone 6a : -10°F to -5°F |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Dfb - Humid Continental Mild Summer, Wet All Year |