Copemish, Michigan has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 36.2 °F (low) to 55.2 °F (high). Annual precipitation averages 35.1 Inches. Copemish is located in USDA Plant Hardiness Zone 6a. The growing season typically runs from the last frost around May 11 - May 20 through the first frost around Oct. 11 - Oct. 20.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 15.0 °F | 28.4 °F | 2.17 in. |
| February | 14.8 °F | 30.9 °F | 1.51 in. |
| March | 21.5 °F | 40.8 °F | 2.06 in. |
| April | 32.1 °F | 53.6 °F | 3.04 in. |
| May | 43.2 °F | 66.7 °F | 3.23 in. |
| June | 52.9 °F | 76.2 °F | 3.21 in. |
| July | 57.4 °F | 80.1 °F | 3.06 in. |
| August | 56.5 °F | 78.5 °F | 3.12 in. |
| September | 49.8 °F | 71.5 °F | 3.64 in. |
| October | 39.3 °F | 58.1 °F | 4.42 in. |
| November | 30.0 °F | 44.2 °F | 3.14 in. |
| December | 21.8 °F | 33.6 °F | 2.45 in. |
| Annual | 36.2 °F | 55.2 °F | 35.05 in. |
| Average First Frost Date | Oct. 11 - Oct. 20 |
| Average Last Frost Date | May 11 - May 20 |
| Average Days With Frost | 125-150 Days |
| Plant Hardiness Zone | Zone 6a : -10°F to -5°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 |