Interlaken, New York has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 3.7 °C (low) to 14 °C (high). Annual precipitation averages 936 Millimeters. Interlaken is located in USDA Plant Hardiness Zone 6a. 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 | -8.7 °C | -0.1 °C | 54.61 mm |
| February | -8.1 °C | 1.1 °C | 45.21 mm |
| March | -4.3 °C | 5.6 °C | 67.31 mm |
| April | 1.7 °C | 13.1 °C | 80.77 mm |
| May | 8 °C | 20.2 °C | 79.25 mm |
| June | 13.2 °C | 24.7 °C | 96.27 mm |
| July | 15.8 °C | 27.1 °C | 102.62 mm |
| August | 14.9 °C | 26.3 °C | 87.38 mm |
| September | 11.1 °C | 22.7 °C | 95.76 mm |
| October | 5.4 °C | 15.5 °C | 92.2 mm |
| November | 0.2 °C | 8.8 °C | 70.61 mm |
| December | -4.6 °C | 2.8 °C | 64.01 mm |
| Annual | 3.7 °C | 14 °C | 936 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 6a : -23.3°C to -20.6°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 |