Eastport, Michigan has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 37.6 °F (low) to 53.4 °F (high). Annual precipitation averages 33 Inches. Eastport 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. 11 - Oct. 20.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 16.6 °F | 27.5 °F | 2.1 in. |
| February | 15.8 °F | 29.2 °F | 1.43 in. |
| March | 21.8 °F | 38.3 °F | 1.74 in. |
| April | 32.8 °F | 50.6 °F | 2.8 in. |
| May | 43.8 °F | 63.8 °F | 3.03 in. |
| June | 53.6 °F | 73.1 °F | 3.12 in. |
| July | 59.1 °F | 77.8 °F | 2.72 in. |
| August | 58.5 °F | 76.8 °F | 3.13 in. |
| September | 51.9 °F | 70.2 °F | 3.65 in. |
| October | 41.3 °F | 56.3 °F | 4.12 in. |
| November | 32.5 °F | 44.2 °F | 2.79 in. |
| December | 23.6 °F | 33.3 °F | 2.41 in. |
| Annual | 37.6 °F | 53.4 °F | 33.04 in. |
| Average First Frost Date | Oct. 11 - Oct. 20 |
| Average Last Frost Date | May 11 - May 20 |
| Average Days With Frost | 125-150 Days |
| Plant Hardiness Zone | Zone 6a : -10°F to -5°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 |