Leverett, Massachusetts has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 35.2 °F (low) to 56.8 °F (high). Annual precipitation averages 50.2 Inches. 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 °F | 31.1 °F | 3.52 in. |
| February | 13.1 °F | 33.9 °F | 3.18 in. |
| March | 21.5 °F | 42.2 °F | 3.97 in. |
| April | 32.4 °F | 56.0 °F | 3.99 in. |
| May | 43.8 °F | 67.3 °F | 3.77 in. |
| June | 52.8 °F | 76.0 °F | 4.93 in. |
| July | 58.5 °F | 81.2 °F | 4.28 in. |
| August | 56.4 °F | 79.5 °F | 4.68 in. |
| September | 48.5 °F | 72.6 °F | 4.85 in. |
| October | 37.5 °F | 59.0 °F | 5.03 in. |
| November | 28.5 °F | 47.0 °F | 3.7 in. |
| December | 18.4 °F | 36.1 °F | 4.26 in. |
| Annual | 35.2 °F | 56.8 °F | 50.16 in. |
| 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 : -10°F to -5°F |
| Plant Hardiness Zone - 2012 | Zone 5b : -15°F to -10°F |
| Current Drought Conditions | Moderate Drought |
| Köppen Climate Classification | Dfb - Humid Continental Mild Summer, Wet All Year |