Berkshire, New York has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 2.9 °C (low) to 12.8 °C (high). Annual precipitation averages 1182.1 Millimeters. Berkshire is located in USDA Plant Hardiness Zone 5b. 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 | -9.6 °C | -1.1 °C | 79.5 mm |
| February | -9 °C | 0.2 °C | 69.34 mm |
| March | -5.2 °C | 4.5 °C | 86.11 mm |
| April | 1.4 °C | 12 °C | 100.33 mm |
| May | 7.4 °C | 18.8 °C | 100.84 mm |
| June | 12.6 °C | 23.4 °C | 128.52 mm |
| July | 15 °C | 25.8 °C | 108.97 mm |
| August | 14.2 °C | 25.2 °C | 113.54 mm |
| September | 10.1 °C | 21.3 °C | 115.57 mm |
| October | 4.4 °C | 14.4 °C | 101.35 mm |
| November | -0.9 °C | 7.6 °C | 92.46 mm |
| December | -5.8 °C | 1.7 °C | 85.6 mm |
| Annual | 2.9 °C | 12.8 °C | 1182.13 mm |
| 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 5b : -26.1°C to -23.3°C |
| Plant Hardiness Zone - 2012 | Zone 5b : -26.1°C to -23.3°C |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Dfb - Humid Continental Mild Summer, Wet All Year |