Soudan, Minnesota has a Humid Continental Mild Summer With Dry Winters climate (Köppen classification: Dwb). Average annual temperatures range from -3.1 °C (low) to 9.4 °C (high). Annual precipitation averages 689.6 Millimeters. Soudan is located in USDA Plant Hardiness Zone 3a. The growing season typically runs from the last frost around May 21 - May 31 through the first frost around Sep.11 - Sep. 20.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -20.7 °C | -8.4 °C | 24.13 mm |
| February | -19.3 °C | -5.2 °C | 18.8 mm |
| March | -11.7 °C | 2.1 °C | 25.65 mm |
| April | -3.9 °C | 9.4 °C | 49.53 mm |
| May | 3.3 °C | 17.2 °C | 77.47 mm |
| June | 9.2 °C | 22.5 °C | 91.19 mm |
| July | 11.7 °C | 25.2 °C | 104.65 mm |
| August | 10.5 °C | 24.1 °C | 79.5 mm |
| September | 6.3 °C | 19.2 °C | 84.33 mm |
| October | -0.1 °C | 10.6 °C | 71.88 mm |
| November | -7.5 °C | 1.3 °C | 35.56 mm |
| December | -15.4 °C | -5.6 °C | 26.92 mm |
| Annual | -3.1 °C | 9.4 °C | 689.61 mm |
| Average First Frost Date | Sep.11 - Sep. 20 |
| Average Last Frost Date | May 21 - May 31 |
| Average Days With Frost | Over 180 Days |
| Plant Hardiness Zone | Zone 3a : -40°C to -37.2°C |
| Plant Hardiness Zone - 2012 | Zone 3a : -40°C to -37.2°C |
| Current Drought Conditions | Moderate Drought |
| Köppen Climate Classification | Dwb - Humid Continental Mild Summer With Dry Winters |