Winn, Michigan has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 36.5 °F (low) to 56.4 °F (high). Annual precipitation averages 34.2 Inches. Winn 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 | 14.3 °F | 28.8 °F | 2.1 in. |
| February | 14.4 °F | 31.5 °F | 1.74 in. |
| March | 22.2 °F | 42.0 °F | 2.12 in. |
| April | 33.4 °F | 55.6 °F | 3.52 in. |
| May | 45.3 °F | 67.9 °F | 3.72 in. |
| June | 55.1 °F | 77.6 °F | 3.55 in. |
| July | 58.5 °F | 81.6 °F | 3.04 in. |
| August | 56.9 °F | 79.8 °F | 3.52 in. |
| September | 49.0 °F | 72.9 °F | 2.82 in. |
| October | 38.4 °F | 59.2 °F | 3.39 in. |
| November | 29.2 °F | 45.6 °F | 2.62 in. |
| December | 21.0 °F | 34.1 °F | 2.04 in. |
| Annual | 36.5 °F | 56.4 °F | 34.18 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 5b : -15°F to -10°F |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Dfb - Humid Continental Mild Summer, Wet All Year |