Mesick, Michigan has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 35.2 °F (low) to 55.4 °F (high). Annual precipitation averages 35.4 Inches. Mesick is located in USDA Plant Hardiness Zone 5b. The growing season typically runs from the last frost around May 11 - May 20 through the first frost around Oct. 1 - Oct. 10.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 13.7 °F | 27.9 °F | 2.38 in. |
| February | 13.4 °F | 30.8 °F | 1.77 in. |
| March | 20.6 °F | 41.1 °F | 2.07 in. |
| April | 31.3 °F | 54.3 °F | 3.28 in. |
| May | 42.4 °F | 67.4 °F | 3.38 in. |
| June | 52.3 °F | 76.9 °F | 3.34 in. |
| July | 56.5 °F | 80.7 °F | 3.12 in. |
| August | 55.4 °F | 78.9 °F | 3.16 in. |
| September | 48.7 °F | 71.7 °F | 3.34 in. |
| October | 38.2 °F | 58.0 °F | 4.04 in. |
| November | 28.9 °F | 43.9 °F | 3.01 in. |
| December | 20.7 °F | 33.2 °F | 2.48 in. |
| Annual | 35.2 °F | 55.4 °F | 35.37 in. |
| Average First Frost Date | Oct. 1 - Oct. 10 |
| Average Last Frost Date | May 11 - May 20 |
| Average Days With Frost | 150-180 Days |
| Plant Hardiness Zone | Zone 5b : -15°F to -10°F |
| Plant Hardiness Zone - 2012 | Zone 5a : -20°F to -15°F |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Dfb - Humid Continental Mild Summer, Wet All Year |