Bergen, New York has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 4.2 °C (low) to 14.2 °C (high). Annual precipitation averages 865.6 Millimeters. Bergen 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 | -8.1 °C | 0.3 °C | 62.48 mm |
| February | -7.8 °C | 1.2 °C | 44.96 mm |
| March | -3.8 °C | 5.6 °C | 64.01 mm |
| April | 2.1 °C | 13.2 °C | 76.96 mm |
| May | 8.3 °C | 20.2 °C | 76.96 mm |
| June | 13.7 °C | 24.9 °C | 78.74 mm |
| July | 16.3 °C | 27.1 °C | 86.36 mm |
| August | 15.5 °C | 26.4 °C | 82.3 mm |
| September | 11.6 °C | 22.8 °C | 74.17 mm |
| October | 5.8 °C | 15.9 °C | 81.28 mm |
| November | 0.4 °C | 9.1 °C | 70.36 mm |
| December | -4.2 °C | 3.3 °C | 67.06 mm |
| Annual | 4.2 °C | 14.2 °C | 865.64 mm |
| Average First Frost Date | Oct. 11 - Oct. 20 |
| Average Last Frost Date | Apr. 21 - Apr. 30 |
| 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 | Normal |
| Köppen Climate Classification | Dfb - Humid Continental Mild Summer, Wet All Year |