Madison, Wisconsin has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 3 °C (low) to 13.7 °C (high). Annual precipitation averages 968.8 Millimeters. 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 | -11.7 °C | -2.7 °C | 38.86 mm |
| February | -10.2 °C | -0.5 °C | 40.39 mm |
| March | -4.3 °C | 6.2 °C | 54.36 mm |
| April | 2.1 °C | 13.8 °C | 96.01 mm |
| May | 8.7 °C | 20.5 °C | 112.27 mm |
| June | 14.3 °C | 25.8 °C | 143.51 mm |
| July | 16.7 °C | 27.8 °C | 114.3 mm |
| August | 15.5 °C | 26.8 °C | 105.92 mm |
| September | 10.8 °C | 22.8 °C | 89.66 mm |
| October | 4.3 °C | 15.7 °C | 73.15 mm |
| November | -2 °C | 7.3 °C | 56.39 mm |
| December | -7.8 °C | 0.3 °C | 43.94 mm |
| Annual | 3 °C | 13.7 °C | 968.76 mm |
| 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 : -28.9°C to -26.1°C |
| Plant Hardiness Zone - 2012 | Zone 5a : -28.9°C to -26.1°C |
| Current Drought Conditions | Abnormally Dry |
| Köppen Climate Classification | Dfa - Humid Continental Hot Summers With Year Around Precipitation |