Berkley, Massachusetts has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 5.5 °C (low) to 15.9 °C (high). Annual precipitation averages 1294.4 Millimeters. Berkley is located in USDA Plant Hardiness Zone 6b. The growing season typically runs from the last frost around Apr. 21 - Apr. 30 through the first frost around Oct. 11 - Oct. 20.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -6.1 °C | 3.3 °C | 109.47 mm |
| February | -5.4 °C | 4.4 °C | 91.95 mm |
| March | -1.8 °C | 8.2 °C | 134.37 mm |
| April | 3.4 °C | 14.5 °C | 117.09 mm |
| May | 8.8 °C | 20.2 °C | 90.68 mm |
| June | 14.1 °C | 25.1 °C | 103.12 mm |
| July | 17.6 °C | 28.3 °C | 89.41 mm |
| August | 16.8 °C | 27.6 °C | 95 mm |
| September | 12.9 °C | 23.7 °C | 103.89 mm |
| October | 6.8 °C | 17.3 °C | 123.19 mm |
| November | 1.6 °C | 11.4 °C | 111.25 mm |
| December | -2.8 °C | 6.2 °C | 124.97 mm |
| Annual | 5.5 °C | 15.9 °C | 1294.39 mm |
| Average First Frost Date | Oct. 11 - Oct. 20 |
| Average Last Frost Date | Apr. 21 - Apr. 30 |
| Average Days With Frost | 100-125 Days |
| Plant Hardiness Zone | Zone 6b : -20.6°C to -17.8°C |
| Plant Hardiness Zone - 2012 | Zone 6b : -20.6°C to -17.8°C |
| Current Drought Conditions | Severe Drought |
| Köppen Climate Classification | Dfb - Humid Continental Mild Summer, Wet All Year |