Gilboa, New York has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 2.2 °C (low) to 14.3 °C (high). Annual precipitation averages 1003.3 Millimeters. Gilboa is located in USDA Plant Hardiness Zone 5b. 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 | -10.3 °C | 0.3 °C | 61.72 mm |
| February | -9.6 °C | 1.9 °C | 52.07 mm |
| March | -5.6 °C | 6.1 °C | 72.39 mm |
| April | 0.7 °C | 13.7 °C | 84.58 mm |
| May | 6.7 °C | 20.5 °C | 89.66 mm |
| June | 11.7 °C | 24.9 °C | 111 mm |
| July | 14.3 °C | 27.2 °C | 107.19 mm |
| August | 13.4 °C | 26.4 °C | 99.82 mm |
| September | 9.4 °C | 22.7 °C | 92.96 mm |
| October | 3.4 °C | 15.8 °C | 94.49 mm |
| November | -1.6 °C | 8.9 °C | 67.56 mm |
| December | -5.9 °C | 2.9 °C | 69.85 mm |
| Annual | 2.2 °C | 14.3 °C | 1003.29 mm |
| Average First Frost Date | Oct. 1 - Oct. 10 |
| Average Last Frost Date | May 1 - May 10 |
| Average Days With Frost | 125-150 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 |