Grand Beach, Michigan has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 6 °C (low) to 13.9 °C (high). Annual precipitation averages 973.1 Millimeters. Grand Beach is located in USDA Plant Hardiness Zone 6b. The growing season typically runs from the last frost around Apr. 11 - Apr. 20 through the first frost around Oct. 21 - Oct. 31.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -7.1 °C | 0.2 °C | 64.01 mm |
| February | -5.8 °C | 1.7 °C | 51.31 mm |
| March | -1.3 °C | 6.7 °C | 58.67 mm |
| April | 4.2 °C | 12.9 °C | 87.63 mm |
| May | 9.9 °C | 18.8 °C | 89.92 mm |
| June | 15.5 °C | 23.7 °C | 107.19 mm |
| July | 18.7 °C | 26.2 °C | 100.84 mm |
| August | 18.1 °C | 25.6 °C | 105.41 mm |
| September | 14.2 °C | 22.4 °C | 84.58 mm |
| October | 7.4 °C | 16.3 °C | 96.27 mm |
| November | 1.9 °C | 9.5 °C | 68.33 mm |
| December | -3.7 °C | 3 °C | 58.93 mm |
| Annual | 6 °C | 13.9 °C | 973.09 mm |
| Average First Frost Date | Oct. 21 - Oct. 31 |
| Average Last Frost Date | Apr. 11 - Apr. 20 |
| 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 |