Lake Leelanau, Michigan has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 3 °C (low) to 12.2 °C (high). Annual precipitation averages 854.2 Millimeters. Lake Leelanau 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 | -8.5 °C | -2.3 °C | 62.23 mm |
| February | -9.1 °C | -1.3 °C | 41.4 mm |
| March | -5.5 °C | 3.8 °C | 50.29 mm |
| April | 0.2 °C | 10.7 °C | 77.98 mm |
| May | 6.3 °C | 17.9 °C | 78.49 mm |
| June | 11.9 °C | 23.4 °C | 81.53 mm |
| July | 14.9 °C | 25.8 °C | 69.09 mm |
| August | 14.7 °C | 25.2 °C | 72.9 mm |
| September | 10.9 °C | 21.4 °C | 88.14 mm |
| October | 5 °C | 13.9 °C | 98.55 mm |
| November | 0 °C | 6.9 °C | 72.9 mm |
| December | -4.8 °C | 0.9 °C | 60.71 mm |
| Annual | 3 °C | 12.2 °C | 854.21 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 6a : -23.3°C to -20.6°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 |