Detroit Lakes, Minnesota has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from -0.4 °C (low) to 10.4 °C (high). Annual precipitation averages 681 Millimeters. Detroit Lakes is located in USDA Plant Hardiness Zone 4a. The growing season typically runs from the last frost around May 1 - May 10 through the first frost around Sep. 21 - Sep. 30.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -18.1 °C | -8 °C | 16.26 mm |
| February | -16.5 °C | -5.3 °C | 15.75 mm |
| March | -8.7 °C | 1.8 °C | 24.64 mm |
| April | -0.8 °C | 11 °C | 46.48 mm |
| May | 6.5 °C | 18.5 °C | 87.63 mm |
| June | 12.7 °C | 23.8 °C | 114.81 mm |
| July | 15.1 °C | 26.3 °C | 103.12 mm |
| August | 13.7 °C | 25.4 °C | 77.47 mm |
| September | 9 °C | 20.9 °C | 78.74 mm |
| October | 1.8 °C | 12.1 °C | 72.14 mm |
| November | -6 °C | 2.7 °C | 23.88 mm |
| December | -13.6 °C | -4.8 °C | 20.07 mm |
| Annual | -0.4 °C | 10.4 °C | 680.99 mm |
| Average First Frost Date | Sep. 21 - Sep. 30 |
| Average Last Frost Date | May 1 - May 10 |
| Average Days With Frost | 150-180 Days |
| Plant Hardiness Zone | Zone 4a : -34.4°C to -31.7°C |
| Plant Hardiness Zone - 2012 | Zone 3b : -37.2°C to -34.4°C |
| Current Drought Conditions | Abnormally Dry |
| Köppen Climate Classification | Dfb - Humid Continental Mild Summer, Wet All Year |