Bethel, New York has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 2.5 °C (low) to 13.6 °C (high). Annual precipitation averages 1194.6 Millimeters. Bethel is located in USDA Plant Hardiness Zone 6a. 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 | -10 °C | -0.4 °C | 83.31 mm |
| February | -9.4 °C | 1.2 °C | 62.23 mm |
| March | -4.9 °C | 5.9 °C | 86.36 mm |
| April | 1.1 °C | 13.1 °C | 95.5 mm |
| May | 7.1 °C | 19.5 °C | 104.14 mm |
| June | 12.2 °C | 23.9 °C | 129.79 mm |
| July | 14.7 °C | 26.6 °C | 115.32 mm |
| August | 13.9 °C | 25.5 °C | 109.22 mm |
| September | 9.9 °C | 21.7 °C | 117.09 mm |
| October | 3.7 °C | 15 °C | 110.49 mm |
| November | -1.6 °C | 8.3 °C | 83.06 mm |
| December | -6.2 °C | 2.3 °C | 98.04 mm |
| Annual | 2.5 °C | 13.6 °C | 1194.55 mm |
| Average First Frost Date | Oct. 1 - Oct. 10 |
| Average Last Frost Date | May 1 - May 10 |
| Average Days With Frost | 150-180 Days |
| Plant Hardiness Zone | Zone 6a : -23.3°C to -20.6°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 |