Algonac, Michigan has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 5 °C (low) to 14.4 °C (high). Annual precipitation averages 870.2 Millimeters. Algonac is located in USDA Plant Hardiness Zone 6b. The growing season typically runs from the last frost around Apr. 21 - Apr. 30 through the first frost around Oct. 21 - Oct. 31.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -7.5 °C | -0.2 °C | 66.8 mm |
| February | -7.1 °C | 1.1 °C | 54.36 mm |
| March | -3 °C | 6.2 °C | 59.69 mm |
| April | 2.8 °C | 13.4 °C | 80.26 mm |
| May | 9 °C | 19.9 °C | 91.69 mm |
| June | 14.6 °C | 25.6 °C | 85.09 mm |
| July | 17.2 °C | 28 °C | 72.9 mm |
| August | 16.7 °C | 27.1 °C | 87.88 mm |
| September | 12.7 °C | 23.7 °C | 78.99 mm |
| October | 6.7 °C | 16.4 °C | 67.31 mm |
| November | 1.2 °C | 9 °C | 64.01 mm |
| December | -3.7 °C | 2.8 °C | 61.21 mm |
| Annual | 5 °C | 14.4 °C | 870.19 mm |
| Average First Frost Date | Oct. 21 - Oct. 31 |
| Average Last Frost Date | Apr. 21 - Apr. 30 |
| Average Days With Frost | 100-125 Days |
| Plant Hardiness Zone | Zone 6b : -20.6°C to -17.8°C |
| Plant Hardiness Zone - 2012 | Zone 6a : -23.3°C to -20.6°C |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Dfa - Humid Continental Hot Summers With Year Around Precipitation |