Leonard, Michigan has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 38.9 °F (low) to 56.8 °F (high). Annual precipitation averages 33.9 Inches. Leonard is located in USDA Plant Hardiness Zone 6a. The growing season typically runs from the last frost around May 1 - May 10 through the first frost around Oct. 1 - Oct. 10.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 16.3 °F | 29.9 °F | 2.26 in. |
| February | 16.2 °F | 32.8 °F | 1.96 in. |
| March | 25.0 °F | 42.6 °F | 2.14 in. |
| April | 35.2 °F | 55.5 °F | 3.2 in. |
| May | 47.8 °F | 67.7 °F | 3.69 in. |
| June | 57.5 °F | 77.3 °F | 3.35 in. |
| July | 61.6 °F | 81.4 °F | 3.5 in. |
| August | 59.7 °F | 79.3 °F | 3.2 in. |
| September | 52.6 °F | 73.1 °F | 2.86 in. |
| October | 41.3 °F | 59.8 °F | 2.96 in. |
| November | 31.6 °F | 46.8 °F | 2.57 in. |
| December | 22.5 °F | 34.9 °F | 2.19 in. |
| Annual | 38.9 °F | 56.8 °F | 33.88 in. |
| Average First Frost Date | Oct. 1 - Oct. 10 |
| Average Last Frost Date | May 1 - May 10 |
| Average Days With Frost | 125-150 Days |
| Plant Hardiness Zone | Zone 6a : -10°F to -5°F |
| Plant Hardiness Zone - 2012 | Zone 6a : -10°F to -5°F |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Dfa - Humid Continental Hot Summers With Year Around Precipitation |