Berne, New York has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 1.5 °C (low) to 13.8 °C (high). Annual precipitation averages 1021.1 Millimeters. Berne is located in USDA Plant Hardiness Zone 5b. The growing season typically runs from the last frost around May 11 - May 20 through the first frost around Sep. 21 - Sep. 30.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -11.4 °C | -0.5 °C | 69.6 mm |
| February | -10.7 °C | 0.9 °C | 52.83 mm |
| March | -6.6 °C | 5.2 °C | 74.93 mm |
| April | -0.2 °C | 13.3 °C | 80.01 mm |
| May | 6.2 °C | 20.2 °C | 87.12 mm |
| June | 11.3 °C | 24.6 °C | 105.66 mm |
| July | 13.9 °C | 27.2 °C | 92.71 mm |
| August | 13 °C | 26.3 °C | 95.76 mm |
| September | 8.7 °C | 22.6 °C | 97.28 mm |
| October | 2.8 °C | 15.4 °C | 105.16 mm |
| November | -2.1 °C | 8.4 °C | 76.96 mm |
| December | -7.2 °C | 2.5 °C | 83.06 mm |
| Annual | 1.5 °C | 13.8 °C | 1021.08 mm |
| Average First Frost Date | Sep. 21 - Sep. 30 |
| Average Last Frost Date | May 11 - May 20 |
| Average Days With Frost | 150-180 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 |