Glencoe, Minnesota has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 1.7 °C (low) to 12.4 °C (high). Annual precipitation averages 794.8 Millimeters. Glencoe 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 | -15 °C | -5.6 °C | 21.59 mm |
| February | -13.2 °C | -2.9 °C | 22.35 mm |
| March | -6 °C | 3.9 °C | 39.12 mm |
| April | 1.3 °C | 12.8 °C | 70.87 mm |
| May | 8.5 °C | 20.1 °C | 104.65 mm |
| June | 14.5 °C | 25.6 °C | 126.24 mm |
| July | 16.7 °C | 27.9 °C | 95.5 mm |
| August | 15.2 °C | 26.5 °C | 108.71 mm |
| September | 10.5 °C | 22.7 °C | 82.04 mm |
| October | 3.2 °C | 14.6 °C | 57.4 mm |
| November | -3.9 °C | 5.3 °C | 36.83 mm |
| December | -11.1 °C | -2.4 °C | 29.46 mm |
| Annual | 1.7 °C | 12.4 °C | 794.76 mm |
| 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 : -31.7°C to -28.9°C |
| Plant Hardiness Zone - 2012 | Zone 4b : -31.7°C to -28.9°C |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Dfb - Humid Continental Mild Summer, Wet All Year |