Madison, Indiana has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 7.3 °C (low) to 18.6 °C (high). Annual precipitation averages 1247.7 Millimeters. Madison is located in USDA Plant Hardiness Zone 7a. The growing season typically runs from the last frost around Apr. 11 - Apr. 20 through the first frost around Oct. 21 - Oct. 31.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -4.3 °C | 4.6 °C | 89.66 mm |
| February | -3.1 °C | 6.9 °C | 84.07 mm |
| March | 0.9 °C | 12.7 °C | 107.95 mm |
| April | 6.3 °C | 19.4 °C | 126.75 mm |
| May | 12 °C | 24.2 °C | 135.64 mm |
| June | 16.6 °C | 28.4 °C | 124.21 mm |
| July | 19 °C | 30.2 °C | 110.24 mm |
| August | 18.3 °C | 30 °C | 100.33 mm |
| September | 14.1 °C | 26.7 °C | 83.31 mm |
| October | 7.6 °C | 20.4 °C | 89.92 mm |
| November | 1.8 °C | 13.2 °C | 89.15 mm |
| December | -1.9 °C | 7 °C | 106.43 mm |
| Annual | 7.3 °C | 18.6 °C | 1247.66 mm |
| Average First Frost Date | Oct. 21 - Oct. 31 |
| Average Last Frost Date | Apr. 11 - Apr. 20 |
| Average Days With Frost | 75-100 Days |
| Plant Hardiness Zone | Zone 7a : -17.8°C to -15°C |
| Plant Hardiness Zone - 2012 | Zone 6b : -20.6°C to -17.8°C |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Dfa - Humid Continental Hot Summers With Year Around Precipitation |