Cologne, Minnesota has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 35.7 °F (low) to 54.7 °F (high). Annual precipitation averages 31.3 Inches. Cologne 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 | 5.6 °F | 22.7 °F | 0.81 in. |
| February | 9.1 °F | 27.4 °F | 0.85 in. |
| March | 21.6 °F | 40.0 °F | 1.56 in. |
| April | 35.0 °F | 55.4 °F | 2.77 in. |
| May | 47.8 °F | 68.5 °F | 4.28 in. |
| June | 58.3 °F | 77.9 °F | 4.69 in. |
| July | 62.5 °F | 82.4 °F | 3.86 in. |
| August | 60.0 °F | 80.2 °F | 4.3 in. |
| September | 51.8 °F | 73.1 °F | 3.14 in. |
| October | 38.5 °F | 58.4 °F | 2.37 in. |
| November | 25.8 °F | 41.9 °F | 1.5 in. |
| December | 12.6 °F | 27.9 °F | 1.18 in. |
| Annual | 35.7 °F | 54.7 °F | 31.31 in. |
| Average First Frost Date | Oct. 1 - Oct. 10 |
| Average Last Frost Date | Apr. 21 - Apr. 30 |
| Average Days With Frost | 125-150 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 |