East Pepperell, Massachusetts has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 37.3 °F (low) to 59.6 °F (high). Annual precipitation averages 48 Inches. East Pepperell is located in USDA Plant Hardiness Zone 6a. The growing season typically runs from the last frost around May 1 - May 10 through the first frost around Oct. 1 - Oct. 10.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 14.3 °F | 34.2 °F | 3.55 in. |
| February | 16.0 °F | 37.1 °F | 3.31 in. |
| March | 24.0 °F | 45.0 °F | 4.29 in. |
| April | 34.6 °F | 58.3 °F | 4.01 in. |
| May | 45.4 °F | 69.4 °F | 3.79 in. |
| June | 54.9 °F | 78.3 °F | 4.44 in. |
| July | 60.4 °F | 83.9 °F | 3.65 in. |
| August | 58.6 °F | 82.2 °F | 3.86 in. |
| September | 50.6 °F | 74.8 °F | 4.06 in. |
| October | 38.6 °F | 62.1 °F | 4.73 in. |
| November | 29.4 °F | 50.3 °F | 3.86 in. |
| December | 20.8 °F | 39.6 °F | 4.47 in. |
| Annual | 37.3 °F | 59.6 °F | 48.02 in. |
| Average First Frost Date | Oct. 1 - Oct. 10 |
| Average Last Frost Date | May 1 - May 10 |
| 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 |