Calumet, Minnesota has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from -1.7 °C (low) to 10 °C (high). Annual precipitation averages 734.3 Millimeters. Calumet is located in USDA Plant Hardiness Zone 3b. The growing season typically runs from the last frost around May 11 - May 20 through the first frost around Sep.11 - Sep. 20.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -19.1 °C | -8 °C | 23.11 mm |
| February | -17.2 °C | -4.4 °C | 20.07 mm |
| March | -9.9 °C | 2.7 °C | 30.23 mm |
| April | -2.2 °C | 10.4 °C | 51.05 mm |
| May | 4.7 °C | 18.1 °C | 81.03 mm |
| June | 10.5 °C | 23 °C | 113.79 mm |
| July | 13.2 °C | 25.5 °C | 106.17 mm |
| August | 11.9 °C | 24.6 °C | 86.36 mm |
| September | 7.4 °C | 19.7 °C | 85.34 mm |
| October | 0.9 °C | 11.4 °C | 70.36 mm |
| November | -6.6 °C | 2.1 °C | 38.35 mm |
| December | -14.3 °C | -5.2 °C | 28.45 mm |
| Annual | -1.7 °C | 10 °C | 734.31 mm |
| Average First Frost Date | Sep.11 - Sep. 20 |
| Average Last Frost Date | May 11 - May 20 |
| Average Days With Frost | Over 180 Days |
| Plant Hardiness Zone | Zone 3b : -37.2°C to -34.4°C |
| Plant Hardiness Zone - 2012 | Zone 3b : -37.2°C to -34.4°C |
| Current Drought Conditions | Severe Drought |
| Köppen Climate Classification | Dfb - Humid Continental Mild Summer, Wet All Year |