Glen Arbor, Michigan has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 3.5 °C (low) to 12.2 °C (high). Annual precipitation averages 847.4 Millimeters. Glen Arbor is located in USDA Plant Hardiness Zone 6b. 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 | -7.7 °C | -1.8 °C | 58.17 mm |
| February | -7.8 °C | -1 °C | 40.39 mm |
| March | -4.8 °C | 3.9 °C | 48.26 mm |
| April | 0.6 °C | 10.7 °C | 74.68 mm |
| May | 6.3 °C | 17.6 °C | 78.74 mm |
| June | 11.7 °C | 22.8 °C | 76.2 mm |
| July | 14.9 °C | 25.3 °C | 70.1 mm |
| August | 15.3 °C | 24.8 °C | 75.44 mm |
| September | 11.6 °C | 21.4 °C | 90.42 mm |
| October | 5.7 °C | 14.3 °C | 100.58 mm |
| November | 0.5 °C | 7 °C | 72.9 mm |
| December | -4.2 °C | 1.1 °C | 61.47 mm |
| Annual | 3.5 °C | 12.2 °C | 847.35 mm |
| 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 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 | Dfb - Humid Continental Mild Summer, Wet All Year |