Bessemer, Michigan has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 30 °F (low) to 50.1 °F (high). Annual precipitation averages 36.1 Inches. Bessemer is located in USDA Plant Hardiness Zone 4b. The growing season typically runs from the last frost around May 11 - May 20 through the first frost around Sep. 21 - Sep. 30.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 3.1 °F | 20.6 °F | 1.99 in. |
| February | 3.9 °F | 25.1 °F | 1.43 in. |
| March | 13.6 °F | 36.4 °F | 1.85 in. |
| April | 27.3 °F | 48.6 °F | 2.96 in. |
| May | 40.4 °F | 63.2 °F | 3.64 in. |
| June | 50.3 °F | 72.7 °F | 3.9 in. |
| July | 55.0 °F | 76.6 °F | 4.16 in. |
| August | 52.7 °F | 74.9 °F | 3.66 in. |
| September | 45.6 °F | 67.1 °F | 3.72 in. |
| October | 34.1 °F | 52.7 °F | 3.79 in. |
| November | 22.7 °F | 37.8 °F | 2.62 in. |
| December | 10.7 °F | 25.9 °F | 2.33 in. |
| Annual | 30 °F | 50.1 °F | 36.05 in. |
| Average First Frost Date | Sep. 21 - Sep. 30 |
| Average Last Frost Date | May 11 - May 20 |
| Average Days With Frost | Over 180 Days |
| Plant Hardiness Zone | Zone 4b : -25°F to -20°F |
| Plant Hardiness Zone - 2012 | Zone 4a : -30°F to -25°F |
| Current Drought Conditions | Abnormally Dry |
| Köppen Climate Classification | Dfb - Humid Continental Mild Summer, Wet All Year |