Negaunee, Michigan has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from -1.1 °C (low) to 10.1 °C (high). Annual precipitation averages 824.2 Millimeters. Negaunee is located in USDA Plant Hardiness Zone 4b. 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 | -14.2 °C | -5.4 °C | 43.94 mm |
| February | -14.7 °C | -3.6 °C | 38.35 mm |
| March | -10.3 °C | 2.3 °C | 45.97 mm |
| April | -3.3 °C | 8.5 °C | 68.58 mm |
| May | 3.7 °C | 16.7 °C | 80.01 mm |
| June | 9.2 °C | 22.3 °C | 85.85 mm |
| July | 11.8 °C | 24.9 °C | 91.44 mm |
| August | 10.9 °C | 23.9 °C | 73.66 mm |
| September | 7.2 °C | 19.6 °C | 92.96 mm |
| October | 1.1 °C | 11.4 °C | 96.01 mm |
| November | -4.4 °C | 3.7 °C | 55.37 mm |
| December | -10.5 °C | -2.6 °C | 52.07 mm |
| Annual | -1.1 °C | 10.1 °C | 824.21 mm |
| Average First Frost Date | Sep. 21 - Sep. 30 |
| Average Last Frost Date | May 21 - May 31 |
| Average Days With Frost | Over 180 Days |
| Plant Hardiness Zone | Zone 4b : -31.7°C to -28.9°C |
| Plant Hardiness Zone - 2012 | Zone 5a : -28.9°C to -26.1°C |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Dfb - Humid Continental Mild Summer, Wet All Year |