Leverett, Massachusetts has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 1.8 °C (low) to 13.8 °C (high). Annual precipitation averages 1274.1 Millimeters. Leverett 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 | -11.4 °C | -0.5 °C | 89.41 mm |
| February | -10.5 °C | 1.1 °C | 80.77 mm |
| March | -5.8 °C | 5.7 °C | 100.84 mm |
| April | 0.2 °C | 13.3 °C | 101.35 mm |
| May | 6.6 °C | 19.6 °C | 95.76 mm |
| June | 11.6 °C | 24.4 °C | 125.22 mm |
| July | 14.7 °C | 27.3 °C | 108.71 mm |
| August | 13.6 °C | 26.4 °C | 118.87 mm |
| September | 9.2 °C | 22.6 °C | 123.19 mm |
| October | 3.1 °C | 15 °C | 127.76 mm |
| November | -1.9 °C | 8.3 °C | 93.98 mm |
| December | -7.6 °C | 2.3 °C | 108.2 mm |
| Annual | 1.8 °C | 13.8 °C | 1274.06 mm |
| Average First Frost Date | Oct. 1 - Oct. 10 |
| Average Last Frost Date | May 11 - May 20 |
| Average Days With Frost | 125-150 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 |