East Douglas, Massachusetts has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 3.9 °C (low) to 15.4 °C (high). Annual precipitation averages 1265.4 Millimeters. East Douglas 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 | -8.4 °C | 2.1 °C | 98.81 mm |
| February | -7.6 °C | 3.5 °C | 89.15 mm |
| March | -3.4 °C | 7.7 °C | 120.65 mm |
| April | 2.2 °C | 14.7 °C | 115.06 mm |
| May | 8.1 °C | 20.5 °C | 89.41 mm |
| June | 13.1 °C | 25.1 °C | 105.16 mm |
| July | 16.4 °C | 28 °C | 96.52 mm |
| August | 15.4 °C | 27.1 °C | 102.87 mm |
| September | 11.3 °C | 23.3 °C | 100.33 mm |
| October | 4.9 °C | 16.8 °C | 125.22 mm |
| November | -0.3 °C | 10.7 °C | 98.55 mm |
| December | -4.9 °C | 5 °C | 123.7 mm |
| Annual | 3.9 °C | 15.4 °C | 1265.43 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 |