Canton, Illinois has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 5 °C (low) to 16.5 °C (high). Annual precipitation averages 1014.7 Millimeters. Canton is located in USDA Plant Hardiness Zone 5b. The growing season typically runs from the last frost around Apr. 11 - Apr. 20 through the first frost around Oct. 11 - Oct. 20.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -9.2 °C | 0.3 °C | 44.7 mm |
| February | -7.2 °C | 2.9 °C | 49.78 mm |
| March | -1.6 °C | 9.9 °C | 64.01 mm |
| April | 4.3 °C | 17.1 °C | 103.63 mm |
| May | 11 °C | 23 °C | 136.91 mm |
| June | 16.3 °C | 27.9 °C | 120.65 mm |
| July | 18 °C | 29.7 °C | 105.16 mm |
| August | 16.8 °C | 28.8 °C | 88.65 mm |
| September | 12.2 °C | 25.7 °C | 92.71 mm |
| October | 5.7 °C | 18.7 °C | 76.96 mm |
| November | -0.6 °C | 10.2 °C | 73.91 mm |
| December | -5.9 °C | 3.3 °C | 57.66 mm |
| Annual | 5 °C | 16.5 °C | 1014.73 mm |
| Average First Frost Date | Oct. 11 - Oct. 20 |
| Average Last Frost Date | Apr. 11 - Apr. 20 |
| Average Days With Frost | 100-125 Days |
| Plant Hardiness Zone | Zone 5b : -26.1°C to -23.3°C |
| Plant Hardiness Zone - 2012 | Zone 5b : -26.1°C to -23.3°C |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Dfa - Humid Continental Hot Summers With Year Around Precipitation |