Berkshire, Vermont has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 1 °C (low) to 11.2 °C (high). Annual precipitation averages 1195.8 Millimeters. Berkshire is located in USDA Plant Hardiness Zone 4b. 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 | -14.3 °C | -4.3 °C | 83.06 mm |
| February | -12.8 °C | -2.9 °C | 65.02 mm |
| March | -7.3 °C | 2.4 °C | 77.22 mm |
| April | 0.3 °C | 10.4 °C | 90.42 mm |
| May | 6.7 °C | 18.2 °C | 108.97 mm |
| June | 11.7 °C | 22.9 °C | 115.82 mm |
| July | 13.9 °C | 25.1 °C | 134.87 mm |
| August | 13.2 °C | 24.4 °C | 121.41 mm |
| September | 9.2 °C | 20.3 °C | 108.97 mm |
| October | 3.2 °C | 12.9 °C | 114.81 mm |
| November | -2.7 °C | 5.9 °C | 84.84 mm |
| December | -9.4 °C | -0.7 °C | 90.42 mm |
| Annual | 1 °C | 11.2 °C | 1195.83 mm |
| Average First Frost Date | Oct. 1 - Oct. 10 |
| Average Last Frost Date | May 11 - May 20 |
| Average Days With Frost | 150-180 Days |
| Plant Hardiness Zone | Zone 4b : -31.7°C to -28.9°C |
| Plant Hardiness Zone - 2012 | Zone 4a : -34.4°C to -31.7°C |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Dfb - Humid Continental Mild Summer, Wet All Year |