Ellington, New York has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 2.3 °C (low) to 13.5 °C (high). Annual precipitation averages 1210.6 Millimeters. Ellington is located in USDA Plant Hardiness Zone 6a. 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 | -9.4 °C | -0.6 °C | 96.27 mm |
| February | -9.3 °C | 0.7 °C | 68.07 mm |
| March | -5.6 °C | 5.6 °C | 83.31 mm |
| April | 0.4 °C | 13 °C | 100.84 mm |
| May | 6.5 °C | 19.7 °C | 102.87 mm |
| June | 11.4 °C | 24.1 °C | 114.05 mm |
| July | 13.7 °C | 26.3 °C | 122.94 mm |
| August | 13.1 °C | 25.5 °C | 103.63 mm |
| September | 9.4 °C | 22.1 °C | 106.93 mm |
| October | 3.8 °C | 15.1 °C | 111 mm |
| November | -1.2 °C | 8.2 °C | 98.04 mm |
| December | -5.3 °C | 2.3 °C | 102.62 mm |
| Annual | 2.3 °C | 13.5 °C | 1210.57 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 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 |