North Madison, Ohio has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 6 °C (low) to 13.8 °C (high). Annual precipitation averages 1063.2 Millimeters. North 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 | -6 °C | 1.3 °C | 77.47 mm |
| February | -5.9 °C | 1.8 °C | 56.39 mm |
| March | -2.3 °C | 5.6 °C | 71.88 mm |
| April | 3.9 °C | 12.6 °C | 94.23 mm |
| May | 10.1 °C | 18.5 °C | 90.93 mm |
| June | 15.4 °C | 23.4 °C | 97.28 mm |
| July | 18.1 °C | 25.6 °C | 100.84 mm |
| August | 17.4 °C | 25.1 °C | 90.42 mm |
| September | 13.7 °C | 22.1 °C | 107.7 mm |
| October | 7.9 °C | 16 °C | 98.3 mm |
| November | 2.4 °C | 9.9 °C | 88.39 mm |
| December | -2.3 °C | 4.1 °C | 89.41 mm |
| Annual | 6 °C | 13.8 °C | 1063.24 mm |
| 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 : -20.6°C to -17.8°C |
| Plant Hardiness Zone - 2012 | Zone 6b : -20.6°C to -17.8°C |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Dfb - Humid Continental Mild Summer, Wet All Year |