Leland, Michigan has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 3.6 °C (low) to 11.9 °C (high). Annual precipitation averages 823.7 Millimeters. Leland 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 | -2.2 °C | 63.25 mm |
| February | -8.1 °C | -1.3 °C | 39.88 mm |
| March | -5.1 °C | 3.5 °C | 48.26 mm |
| April | 0.3 °C | 10.1 °C | 73.15 mm |
| May | 5.9 °C | 17.2 °C | 75.95 mm |
| June | 11.7 °C | 22.8 °C | 76.71 mm |
| July | 15.4 °C | 25.4 °C | 68.58 mm |
| August | 15.6 °C | 24.9 °C | 69.85 mm |
| September | 12.1 °C | 21.1 °C | 86.11 mm |
| October | 6 °C | 13.8 °C | 96.01 mm |
| November | 0.8 °C | 6.9 °C | 69.09 mm |
| December | -4.1 °C | 1.1 °C | 56.9 mm |
| Annual | 3.6 °C | 11.9 °C | 823.74 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 |