Madison, Minnesota has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 33.8 °F (low) to 54.9 °F (high). Annual precipitation averages 25.9 Inches. 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 | 3.9 °F | 22.5 °F | 0.67 in. |
| February | 7.3 °F | 26.9 °F | 0.69 in. |
| March | 20.1 °F | 39.1 °F | 1.4 in. |
| April | 33.0 °F | 55.5 °F | 2.44 in. |
| May | 46.2 °F | 69.0 °F | 3.09 in. |
| June | 57.4 °F | 78.9 °F | 3.8 in. |
| July | 60.9 °F | 82.7 °F | 3.76 in. |
| August | 57.9 °F | 80.5 °F | 3.23 in. |
| September | 49.2 °F | 73.7 °F | 2.57 in. |
| October | 36.1 °F | 59.2 °F | 2.34 in. |
| November | 23.2 °F | 42.3 °F | 1.09 in. |
| December | 10.8 °F | 27.9 °F | 0.78 in. |
| Annual | 33.8 °F | 54.9 °F | 25.86 in. |
| 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 : -25°F to -20°F |
| Plant Hardiness Zone - 2012 | Zone 4b : -25°F to -20°F |
| Current Drought Conditions | Moderate Drought |
| Köppen Climate Classification | Dfb - Humid Continental Mild Summer, Wet All Year |