Ellisburg, New York has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 3.2 °C (low) to 13.2 °C (high). Annual precipitation averages 1222.8 Millimeters. Ellisburg 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 | -10.2 °C | -1.1 °C | 116.08 mm |
| February | -9.8 °C | -0.3 °C | 87.88 mm |
| March | -5.2 °C | 4.3 °C | 81.28 mm |
| April | 1.2 °C | 12.2 °C | 90.68 mm |
| May | 7.7 °C | 19.2 °C | 93.47 mm |
| June | 12.8 °C | 23.9 °C | 92.96 mm |
| July | 15.9 °C | 26.3 °C | 90.42 mm |
| August | 15.2 °C | 25.8 °C | 98.81 mm |
| September | 11.1 °C | 22.2 °C | 106.68 mm |
| October | 5.3 °C | 15.2 °C | 131.06 mm |
| November | -0.1 °C | 8.4 °C | 113.03 mm |
| December | -5.7 °C | 2.2 °C | 120.4 mm |
| Annual | 3.2 °C | 13.2 °C | 1222.75 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 5a : -28.9°C to -26.1°C |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Dfb - Humid Continental Mild Summer, Wet All Year |