Lexington, Michigan has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 39.3 °F (low) to 55.3 °F (high). Annual precipitation averages 33.9 Inches. Lexington is located in USDA Plant Hardiness Zone 6a. The growing season typically runs from the last frost around Apr. 21 - Apr. 30 through the first frost around Oct. 21 - Oct. 31.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 17.3 °F | 30.0 °F | 2.29 in. |
| February | 17.2 °F | 32.3 °F | 1.95 in. |
| March | 25.1 °F | 40.7 °F | 2.1 in. |
| April | 34.6 °F | 51.7 °F | 3.23 in. |
| May | 45.3 °F | 63.5 °F | 3.4 in. |
| June | 55.5 °F | 73.7 °F | 3.17 in. |
| July | 61.5 °F | 78.8 °F | 2.98 in. |
| August | 60.7 °F | 78.0 °F | 3.36 in. |
| September | 54.1 °F | 72.2 °F | 3.2 in. |
| October | 43.4 °F | 59.8 °F | 3.19 in. |
| November | 33.1 °F | 47.1 °F | 2.61 in. |
| December | 23.8 °F | 35.7 °F | 2.38 in. |
| Annual | 39.3 °F | 55.3 °F | 33.86 in. |
| Average First Frost Date | Oct. 21 - Oct. 31 |
| Average Last Frost Date | Apr. 21 - Apr. 30 |
| 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 |