Carson City, Michigan has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 37.6 °F (low) to 57 °F (high). Annual precipitation averages 35.3 Inches. Carson City 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. 1 - Oct. 10.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 15.2 °F | 29.3 °F | 2.23 in. |
| February | 15.8 °F | 32.1 °F | 1.9 in. |
| March | 23.9 °F | 42.7 °F | 2.18 in. |
| April | 34.7 °F | 56.2 °F | 3.56 in. |
| May | 46.5 °F | 68.4 °F | 3.93 in. |
| June | 56.2 °F | 78.1 °F | 3.58 in. |
| July | 59.6 °F | 82.0 °F | 3.22 in. |
| August | 57.9 °F | 80.0 °F | 3.54 in. |
| September | 49.9 °F | 73.5 °F | 2.94 in. |
| October | 39.4 °F | 60.2 °F | 3.35 in. |
| November | 30.3 °F | 46.4 °F | 2.7 in. |
| December | 21.8 °F | 34.6 °F | 2.13 in. |
| Annual | 37.6 °F | 57 °F | 35.26 in. |
| Average First Frost Date | Oct. 1 - Oct. 10 |
| Average Last Frost Date | May 1 - May 10 |
| Average Days With Frost | 150-180 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 |