Becket, Massachusetts has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 3.3 °C (low) to 12.8 °C (high). Annual precipitation averages 1416.8 Millimeters. Becket is located in USDA Plant Hardiness Zone 6a. The growing season typically runs from the last frost around May 11 - May 20 through the first frost around Oct. 1 - Oct. 10.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -8.7 °C | -0.9 °C | 95.5 mm |
| February | -8.2 °C | 0.4 °C | 87.63 mm |
| March | -4.6 °C | 4.8 °C | 106.93 mm |
| April | 1.3 °C | 12.2 °C | 108.46 mm |
| May | 7.5 °C | 18.6 °C | 119.38 mm |
| June | 12.4 °C | 23 °C | 130.81 mm |
| July | 15.2 °C | 25.7 °C | 127 mm |
| August | 14.7 °C | 24.9 °C | 133.35 mm |
| September | 10.8 °C | 21.1 °C | 133.1 mm |
| October | 5.4 °C | 14.3 °C | 141.22 mm |
| November | -0.6 °C | 7.2 °C | 108.46 mm |
| December | -5.2 °C | 2 °C | 124.97 mm |
| Annual | 3.3 °C | 12.8 °C | 1416.81 mm |
| Average First Frost Date | Oct. 1 - Oct. 10 |
| Average Last Frost Date | May 11 - May 20 |
| Average Days With Frost | 150-180 Days |
| Plant Hardiness Zone | Zone 6a : -23.3°C to -20.6°C |
| Plant Hardiness Zone - 2012 | Zone 5b : -26.1°C to -23.3°C |
| Current Drought Conditions | Moderate Drought |
| Köppen Climate Classification | Dfb - Humid Continental Mild Summer, Wet All Year |