Freeport, Michigan has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 38.3 °F (low) to 57.3 °F (high). Annual precipitation averages 38.1 Inches. Freeport is located in USDA Plant Hardiness Zone 6a. The growing season typically runs from the last frost around May 1 - May 10 through the first frost around Oct. 11 - Oct. 20.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 16.8 °F | 30.3 °F | 2.64 in. |
| February | 17.1 °F | 32.9 °F | 2.13 in. |
| March | 24.5 °F | 43.3 °F | 2.35 in. |
| April | 35.2 °F | 56.6 °F | 3.72 in. |
| May | 46.5 °F | 68.5 °F | 4.17 in. |
| June | 56.3 °F | 78.0 °F | 3.86 in. |
| July | 60.0 °F | 81.8 °F | 3.42 in. |
| August | 58.6 °F | 80.0 °F | 3.57 in. |
| September | 50.6 °F | 73.3 °F | 3.2 in. |
| October | 40.1 °F | 60.4 °F | 3.67 in. |
| November | 30.8 °F | 46.6 °F | 2.93 in. |
| December | 22.9 °F | 35.3 °F | 2.46 in. |
| Annual | 38.3 °F | 57.3 °F | 38.12 in. |
| Average First Frost Date | Oct. 11 - Oct. 20 |
| Average Last Frost Date | May 1 - May 10 |
| 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 | Dfa - Humid Continental Hot Summers With Year Around Precipitation |