Madison, South Dakota has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 34.1 °F (low) to 54.9 °F (high). Annual precipitation averages 27 Inches. Madison is located in USDA Plant Hardiness Zone 4b. The growing season typically runs from the last frost around May 1 - May 10 through the first frost around Sep. 21 - Sep. 30.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 5.5 °F | 23.8 °F | 0.55 in. |
| February | 9.6 °F | 28.6 °F | 0.72 in. |
| March | 20.9 °F | 40.8 °F | 1.22 in. |
| April | 32.9 °F | 55.3 °F | 2.81 in. |
| May | 45.8 °F | 67.8 °F | 3.75 in. |
| June | 56.8 °F | 77.8 °F | 4.22 in. |
| July | 60.8 °F | 82.3 °F | 3.44 in. |
| August | 58.1 °F | 79.7 °F | 3.35 in. |
| September | 49.3 °F | 73.0 °F | 2.99 in. |
| October | 35.8 °F | 58.9 °F | 2.05 in. |
| November | 22.3 °F | 42.2 °F | 1.14 in. |
| December | 11.2 °F | 28.7 °F | 0.74 in. |
| Annual | 34.1 °F | 54.9 °F | 26.98 in. |
| Average First Frost Date | Sep. 21 - Sep. 30 |
| Average Last Frost Date | May 1 - May 10 |
| 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 | Severe Drought |
| Köppen Climate Classification | Dfa - Humid Continental Hot Summers With Year Around Precipitation |