Gaines, Michigan has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 37.8 °F (low) to 57.4 °F (high). Annual precipitation averages 33.4 Inches. Gaines 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 | 15.4 °F | 30.4 °F | 2.19 in. |
| February | 15.7 °F | 33.2 °F | 1.7 in. |
| March | 23.8 °F | 43.3 °F | 1.99 in. |
| April | 35.1 °F | 56.3 °F | 3.19 in. |
| May | 46.4 °F | 68.6 °F | 3.84 in. |
| June | 56.1 °F | 78.1 °F | 3.49 in. |
| July | 59.5 °F | 81.9 °F | 3.39 in. |
| August | 58.1 °F | 80.0 °F | 3.2 in. |
| September | 50.7 °F | 73.7 °F | 3.14 in. |
| October | 39.9 °F | 60.7 °F | 2.84 in. |
| November | 30.6 °F | 47.2 °F | 2.38 in. |
| December | 22.0 °F | 35.5 °F | 2.0 in. |
| Annual | 37.8 °F | 57.4 °F | 33.35 in. |
| Average First Frost Date | Oct. 1 - Oct. 10 |
| 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 |