Sutton, Massachusetts has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 4.4 °C (low) to 14.3 °C (high). Annual precipitation averages 1271.5 Millimeters. Sutton 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 | -8.2 °C | 1.1 °C | 98.55 mm |
| February | -7.4 °C | 2.4 °C | 88.39 mm |
| March | -3.2 °C | 6.6 °C | 119.89 mm |
| April | 2.7 °C | 13.4 °C | 114.55 mm |
| May | 8.4 °C | 19.4 °C | 90.93 mm |
| June | 13.6 °C | 23.9 °C | 106.93 mm |
| July | 16.8 °C | 26.9 °C | 98.3 mm |
| August | 16 °C | 26 °C | 104.39 mm |
| September | 12.1 °C | 22.2 °C | 101.85 mm |
| October | 5.8 °C | 15.6 °C | 127 mm |
| November | 0.3 °C | 9.7 °C | 98.04 mm |
| December | -4.6 °C | 4 °C | 122.68 mm |
| Annual | 4.4 °C | 14.3 °C | 1271.5 mm |
| Average First Frost Date | Oct. 21 - Oct. 31 |
| Average Last Frost Date | Apr. 11 - Apr. 20 |
| Average Days With Frost | 125-150 Days |
| Plant Hardiness Zone | Zone 6b : -20.6°C to -17.8°C |
| Plant Hardiness Zone - 2012 | Zone 6a : -23.3°C to -20.6°C |
| Current Drought Conditions | Moderate Drought |
| Köppen Climate Classification | Dfb - Humid Continental Mild Summer, Wet All Year |