Laurium, Michigan has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 33.2 °F (low) to 48.5 °F (high). Annual precipitation averages 34.3 Inches. Laurium 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 | 9.6 °F | 21.4 °F | 3.03 in. |
| February | 10.4 °F | 24.1 °F | 1.61 in. |
| March | 17.1 °F | 33.8 °F | 1.69 in. |
| April | 29.5 °F | 44.4 °F | 2.6 in. |
| May | 41.3 °F | 59.6 °F | 2.99 in. |
| June | 50.6 °F | 69.8 °F | 2.91 in. |
| July | 56.3 °F | 74.6 °F | 3.36 in. |
| August | 55.9 °F | 73.3 °F | 2.8 in. |
| September | 48.6 °F | 65.4 °F | 3.48 in. |
| October | 37.1 °F | 51.3 °F | 3.72 in. |
| November | 25.9 °F | 37.6 °F | 2.84 in. |
| December | 16.4 °F | 27.0 °F | 3.27 in. |
| Annual | 33.2 °F | 48.5 °F | 34.3 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 |