Boon, Michigan has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 33.9 °F (low) to 53.5 °F (high). Annual precipitation averages 36.2 Inches. Boon is located in USDA Plant Hardiness Zone 5a. The growing season typically runs from the last frost around May 21 - May 31 through the first frost around Sep. 21 - Sep. 30.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 11.2 °F | 25.9 °F | 2.34 in. |
| February | 10.7 °F | 28.8 °F | 1.77 in. |
| March | 18.2 °F | 39.2 °F | 2.11 in. |
| April | 30.6 °F | 52.1 °F | 3.46 in. |
| May | 42.5 °F | 65.4 °F | 3.58 in. |
| June | 52.3 °F | 74.9 °F | 3.6 in. |
| July | 56.1 °F | 79.1 °F | 3.31 in. |
| August | 54.9 °F | 77.2 °F | 3.38 in. |
| September | 47.1 °F | 69.9 °F | 3.28 in. |
| October | 37.1 °F | 55.9 °F | 3.97 in. |
| November | 27.8 °F | 42.2 °F | 3.01 in. |
| December | 18.7 °F | 31.2 °F | 2.4 in. |
| Annual | 33.9 °F | 53.5 °F | 36.21 in. |
| Average First Frost Date | Sep. 21 - Sep. 30 |
| Average Last Frost Date | May 21 - May 31 |
| Average Days With Frost | 150-180 Days |
| Plant Hardiness Zone | Zone 5a : -20°F to -15°F |
| Plant Hardiness Zone - 2012 | Zone 4b : -25°F to -20°F |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Dfb - Humid Continental Mild Summer, Wet All Year |