Mecosta, Michigan has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 35.8 °F (low) to 55.6 °F (high). Annual precipitation averages 35.8 Inches. Mecosta 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 Sep. 21 - Sep. 30.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 13.6 °F | 28.2 °F | 2.31 in. |
| February | 13.5 °F | 30.9 °F | 1.83 in. |
| March | 21.5 °F | 41.5 °F | 2.24 in. |
| April | 32.9 °F | 54.8 °F | 3.66 in. |
| May | 44.7 °F | 67.0 °F | 3.87 in. |
| June | 54.6 °F | 76.7 °F | 3.54 in. |
| July | 57.6 °F | 80.4 °F | 3.2 in. |
| August | 55.9 °F | 78.9 °F | 3.63 in. |
| September | 48.8 °F | 71.8 °F | 2.98 in. |
| October | 37.7 °F | 58.2 °F | 3.51 in. |
| November | 28.5 °F | 44.8 °F | 2.82 in. |
| December | 20.4 °F | 33.4 °F | 2.2 in. |
| Annual | 35.8 °F | 55.6 °F | 35.79 in. |
| Average First Frost Date | Sep. 21 - Sep. 30 |
| 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 5b : -15°F to -10°F |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Dfb - Humid Continental Mild Summer, Wet All Year |