Litchfield, Michigan has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 3.9 °C (low) to 14.2 °C (high). Annual precipitation averages 947.7 Millimeters. Litchfield 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 | -8.6 °C | -0.8 °C | 62.23 mm |
| February | -8.1 °C | 0.8 °C | 53.85 mm |
| March | -3.6 °C | 6.6 °C | 60.2 mm |
| April | 2.6 °C | 13.9 °C | 90.42 mm |
| May | 9.2 °C | 20.5 °C | 101.35 mm |
| June | 14.4 °C | 25.7 °C | 94.23 mm |
| July | 16.2 °C | 27.7 °C | 88.39 mm |
| August | 15.1 °C | 26.5 °C | 97.54 mm |
| September | 10.9 °C | 23.1 °C | 86.61 mm |
| October | 4.9 °C | 16 °C | 85.85 mm |
| November | -0.6 °C | 8.4 °C | 68.58 mm |
| December | -5.2 °C | 1.8 °C | 58.42 mm |
| Annual | 3.9 °C | 14.2 °C | 947.67 mm |
| 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 : -23.3°C to -20.6°C |
| Plant Hardiness Zone - 2012 | Zone 5b : -26.1°C to -23.3°C |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Dfb - Humid Continental Mild Summer, Wet All Year |