Vestal, New York has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 2.6 °C (low) to 13.5 °C (high). Annual precipitation averages 1121.4 Millimeters. Vestal 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 | -9.6 °C | -0.6 °C | 71.12 mm |
| February | -9.2 °C | 0.8 °C | 55.88 mm |
| March | -5.2 °C | 5.3 °C | 78.49 mm |
| April | 1.1 °C | 12.9 °C | 92.46 mm |
| May | 7 °C | 19.6 °C | 100.08 mm |
| June | 12.2 °C | 24.2 °C | 114.05 mm |
| July | 14.6 °C | 26.4 °C | 114.05 mm |
| August | 13.8 °C | 25.9 °C | 112.52 mm |
| September | 9.7 °C | 22.1 °C | 114.3 mm |
| October | 3.9 °C | 15.1 °C | 105.16 mm |
| November | -1.2 °C | 8.1 °C | 82.3 mm |
| December | -5.8 °C | 2.2 °C | 81.03 mm |
| Annual | 2.6 °C | 13.5 °C | 1121.44 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 5b : -26.1°C to -23.3°C |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Dfb - Humid Continental Mild Summer, Wet All Year |