Eagle Harbor, Michigan has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 1.5 °C (low) to 9.2 °C (high). Annual precipitation averages 750.8 Millimeters. Eagle Harbor is located in USDA Plant Hardiness Zone 6a. 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 | -10.3 °C | -4.3 °C | 64.52 mm |
| February | -10.6 °C | -3.4 °C | 41.66 mm |
| March | -6.8 °C | 1.4 °C | 39.88 mm |
| April | -1.2 °C | 6.6 °C | 47.5 mm |
| May | 4.1 °C | 13.7 °C | 64.52 mm |
| June | 8.8 °C | 18.7 °C | 73.15 mm |
| July | 13.2 °C | 21.9 °C | 68.07 mm |
| August | 14 °C | 22.3 °C | 59.44 mm |
| September | 10.7 °C | 18.6 °C | 79.5 mm |
| October | 4.3 °C | 11.5 °C | 79.25 mm |
| November | -1.6 °C | 4.5 °C | 70.36 mm |
| December | -6.4 °C | -1.1 °C | 62.99 mm |
| Annual | 1.5 °C | 9.2 °C | 750.84 mm |
| 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 6a : -23.3°C to -20.6°C |
| Plant Hardiness Zone - 2012 | Zone 5b : -26.1°C to -23.3°C |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Dfb - Humid Continental Mild Summer, Wet All Year |