Canton, Maine has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 0.7 °C (low) to 12 °C (high). Annual precipitation averages 1274.8 Millimeters. Canton is located in USDA Plant Hardiness Zone 5b. The growing season typically runs from the last frost around May 11 - May 20 through the first frost around Sep. 21 - Sep. 30.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -13.2 °C | -2.9 °C | 88.39 mm |
| February | -12.6 °C | -1.3 °C | 80.26 mm |
| March | -7.2 °C | 3.6 °C | 94.23 mm |
| April | -0.6 °C | 10.8 °C | 109.22 mm |
| May | 5.6 °C | 18.1 °C | 100.33 mm |
| June | 10.8 °C | 22.7 °C | 134.37 mm |
| July | 13.8 °C | 25.7 °C | 103.38 mm |
| August | 12.7 °C | 25.2 °C | 104.14 mm |
| September | 8.3 °C | 21.1 °C | 92.71 mm |
| October | 2.6 °C | 13.6 °C | 143.51 mm |
| November | -2.8 °C | 6.6 °C | 111.25 mm |
| December | -8.7 °C | 0.4 °C | 113.03 mm |
| Annual | 0.7 °C | 12 °C | 1274.82 mm |
| Average First Frost Date | Sep. 21 - Sep. 30 |
| Average Last Frost Date | May 11 - May 20 |
| Average Days With Frost | 150-180 Days |
| Plant Hardiness Zone | Zone 5b : -26.1°C to -23.3°C |
| Plant Hardiness Zone - 2012 | Zone 5a : -28.9°C to -26.1°C |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Dfb - Humid Continental Mild Summer, Wet All Year |