Madison, Minnesota has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 1 °C (low) to 12.7 °C (high). Annual precipitation averages 656.9 Millimeters. Madison 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 Sep. 21 - Sep. 30.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -15.6 °C | -5.3 °C | 17.02 mm |
| February | -13.7 °C | -2.8 °C | 17.53 mm |
| March | -6.6 °C | 3.9 °C | 35.56 mm |
| April | 0.6 °C | 13.1 °C | 61.98 mm |
| May | 7.9 °C | 20.6 °C | 78.49 mm |
| June | 14.1 °C | 26.1 °C | 96.52 mm |
| July | 16.1 °C | 28.2 °C | 95.5 mm |
| August | 14.4 °C | 26.9 °C | 82.04 mm |
| September | 9.6 °C | 23.2 °C | 65.28 mm |
| October | 2.3 °C | 15.1 °C | 59.44 mm |
| November | -4.9 °C | 5.7 °C | 27.69 mm |
| December | -11.8 °C | -2.3 °C | 19.81 mm |
| Annual | 1 °C | 12.7 °C | 656.86 mm |
| Average First Frost Date | Sep. 21 - Sep. 30 |
| Average Last Frost Date | Apr. 21 - Apr. 30 |
| Average Days With Frost | 150-180 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 | Moderate Drought |
| Köppen Climate Classification | Dfb - Humid Continental Mild Summer, Wet All Year |