Litchfield, Minnesota has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 34.1 °F (low) to 53.3 °F (high). Annual precipitation averages 29.8 Inches. Litchfield is located in USDA Plant Hardiness Zone 4b. The growing season typically runs from the last frost around Apr. 21 - Apr. 30 through the first frost around Oct. 1 - Oct. 10.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 3.7 °F | 21.0 °F | 0.71 in. |
| February | 6.7 °F | 25.4 °F | 0.74 in. |
| March | 19.8 °F | 38.2 °F | 1.46 in. |
| April | 33.4 °F | 54.2 °F | 2.57 in. |
| May | 46.4 °F | 67.4 °F | 3.91 in. |
| June | 57.3 °F | 77.2 °F | 4.77 in. |
| July | 61.4 °F | 81.4 °F | 3.83 in. |
| August | 58.6 °F | 78.9 °F | 4.12 in. |
| September | 50.1 °F | 72.0 °F | 3.08 in. |
| October | 37.0 °F | 57.0 °F | 2.4 in. |
| November | 23.8 °F | 40.4 °F | 1.26 in. |
| December | 11.1 °F | 26.5 °F | 0.94 in. |
| Annual | 34.1 °F | 53.3 °F | 29.79 in. |
| Average First Frost Date | Oct. 1 - Oct. 10 |
| Average Last Frost Date | Apr. 21 - Apr. 30 |
| Average Days With Frost | 150-180 Days |
| Plant Hardiness Zone | Zone 4b : -25°F to -20°F |
| Plant Hardiness Zone - 2012 | Zone 4b : -25°F to -20°F |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Dfb - Humid Continental Mild Summer, Wet All Year |