Canton, Massachusetts has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 4.9 °C (low) to 15.6 °C (high). Annual precipitation averages 1278.6 Millimeters. Canton is located in USDA Plant Hardiness Zone 6b. 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 | -7.2 °C | 2.6 °C | 104.14 mm |
| February | -6.4 °C | 3.9 °C | 89.66 mm |
| March | -2.3 °C | 7.8 °C | 126.75 mm |
| April | 3.2 °C | 14.4 °C | 114.55 mm |
| May | 8.6 °C | 20.3 °C | 92.2 mm |
| June | 13.8 °C | 25.1 °C | 104.65 mm |
| July | 17.2 °C | 28.3 °C | 92.46 mm |
| August | 16.4 °C | 27.5 °C | 97.28 mm |
| September | 12.3 °C | 23.6 °C | 98.55 mm |
| October | 6.1 °C | 17 °C | 125.98 mm |
| November | 0.9 °C | 11.1 °C | 107.7 mm |
| December | -3.8 °C | 5.6 °C | 124.71 mm |
| Annual | 4.9 °C | 15.6 °C | 1278.63 mm |
| Average First Frost Date | Oct. 21 - Oct. 31 |
| Average Last Frost Date | Apr. 11 - Apr. 20 |
| 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 | Severe Drought |
| Köppen Climate Classification | Dfb - Humid Continental Mild Summer, Wet All Year |