Witherbee, New York has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from -0.3 °C (low) to 11.8 °C (high). Annual precipitation averages 1109.7 Millimeters. Witherbee is located in USDA Plant Hardiness Zone 4b. The growing season typically runs from the last frost around May 11 - May 20 through the first frost around Oct. 1 - Oct. 10.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -14.7 °C | -3.2 °C | 73.91 mm |
| February | -14 °C | -1.6 °C | 61.21 mm |
| March | -9.2 °C | 3.3 °C | 76.71 mm |
| April | -1.3 °C | 11.2 °C | 84.58 mm |
| May | 5.1 °C | 18.3 °C | 98.3 mm |
| June | 10.2 °C | 23 °C | 114.55 mm |
| July | 12.9 °C | 25.7 °C | 123.7 mm |
| August | 11.8 °C | 24.8 °C | 102.62 mm |
| September | 7.3 °C | 20.9 °C | 90.68 mm |
| October | 1.6 °C | 13.3 °C | 106.68 mm |
| November | -3.8 °C | 6.1 °C | 91.69 mm |
| December | -10 °C | 0.1 °C | 85.09 mm |
| Annual | -0.3 °C | 11.8 °C | 1109.72 mm |
| Average First Frost Date | Oct. 1 - Oct. 10 |
| Average Last Frost Date | May 11 - May 20 |
| Average Days With Frost | 125-150 Days |
| Plant Hardiness Zone | Zone 4b : -31.7°C to -28.9°C |
| Plant Hardiness Zone - 2012 | Zone 4b : -31.7°C to -28.9°C |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Dfb - Humid Continental Mild Summer, Wet All Year |