Madison, Ohio has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 41.9 °F (low) to 57.8 °F (high). Annual precipitation averages 43.5 Inches. Madison is located in USDA Plant Hardiness Zone 6b. The growing season typically runs from the last frost around Apr. 21 - Apr. 30 through the first frost around Oct. 21 - Oct. 31.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 20.1 °F | 33.9 °F | 3.08 in. |
| February | 20.2 °F | 35.7 °F | 2.27 in. |
| March | 27.0 °F | 43.4 °F | 2.9 in. |
| April | 38.0 °F | 56.5 °F | 3.88 in. |
| May | 49.2 °F | 67.4 °F | 3.84 in. |
| June | 58.8 °F | 76.0 °F | 4.06 in. |
| July | 63.5 °F | 79.8 °F | 4.07 in. |
| August | 62.3 °F | 78.6 °F | 3.67 in. |
| September | 55.6 °F | 73.0 °F | 4.41 in. |
| October | 45.3 °F | 61.0 °F | 3.94 in. |
| November | 35.3 °F | 49.7 °F | 3.7 in. |
| December | 26.9 °F | 39.0 °F | 3.68 in. |
| Annual | 41.9 °F | 57.8 °F | 43.5 in. |
| Average First Frost Date | Oct. 21 - Oct. 31 |
| Average Last Frost Date | Apr. 21 - Apr. 30 |
| Average Days With Frost | 100-125 Days |
| Plant Hardiness Zone | Zone 6b : -5°F to 0°F |
| Plant Hardiness Zone - 2012 | Zone 6a : -10°F to -5°F |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Dfb - Humid Continental Mild Summer, Wet All Year |