Caseville, Michigan has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 39.1 °F (low) to 55.2 °F (high). Annual precipitation averages 32 Inches. Caseville is located in USDA Plant Hardiness Zone 6a. The growing season typically runs from the last frost around May 1 - May 10 through the first frost around Oct. 11 - Oct. 20.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 16.3 °F | 29.4 °F | 1.87 in. |
| February | 16.1 °F | 31.0 °F | 1.59 in. |
| March | 24.2 °F | 39.7 °F | 1.76 in. |
| April | 34.5 °F | 52.6 °F | 3.29 in. |
| May | 45.6 °F | 65.7 °F | 3.24 in. |
| June | 56.2 °F | 75.1 °F | 3.4 in. |
| July | 61.6 °F | 79.7 °F | 3.09 in. |
| August | 60.4 °F | 77.9 °F | 3.39 in. |
| September | 53.8 °F | 71.3 °F | 2.99 in. |
| October | 43.1 °F | 58.8 °F | 2.95 in. |
| November | 32.9 °F | 46.0 °F | 2.39 in. |
| December | 24.0 °F | 35.1 °F | 1.99 in. |
| Annual | 39.1 °F | 55.2 °F | 31.95 in. |
| Average First Frost Date | Oct. 11 - Oct. 20 |
| Average Last Frost Date | May 1 - May 10 |
| Average Days With Frost | 125-150 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 |