Madison, Wisconsin has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 37.5 °F (low) to 56.6 °F (high). Annual precipitation averages 38.1 Inches. Madison is located in USDA Plant Hardiness Zone 5a. The growing season typically runs from the last frost around May 1 - May 10 through the first frost around Oct. 1 - Oct. 10.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 10.9 °F | 27.1 °F | 1.53 in. |
| February | 13.7 °F | 31.1 °F | 1.59 in. |
| March | 24.3 °F | 43.2 °F | 2.14 in. |
| April | 35.8 °F | 56.8 °F | 3.78 in. |
| May | 47.7 °F | 68.9 °F | 4.42 in. |
| June | 57.8 °F | 78.4 °F | 5.65 in. |
| July | 62.0 °F | 82.1 °F | 4.5 in. |
| August | 59.9 °F | 80.3 °F | 4.17 in. |
| September | 51.4 °F | 73.1 °F | 3.53 in. |
| October | 39.8 °F | 60.3 °F | 2.88 in. |
| November | 28.4 °F | 45.2 °F | 2.22 in. |
| December | 17.9 °F | 32.6 °F | 1.73 in. |
| Annual | 37.5 °F | 56.6 °F | 38.14 in. |
| Average First Frost Date | Oct. 1 - Oct. 10 |
| Average Last Frost Date | May 1 - May 10 |
| Average Days With Frost | 125-150 Days |
| Plant Hardiness Zone | Zone 5a : -20°F to -15°F |
| Plant Hardiness Zone - 2012 | Zone 5a : -20°F to -15°F |
| Current Drought Conditions | Moderate Drought |
| Köppen Climate Classification | Dfa - Humid Continental Hot Summers With Year Around Precipitation |