Millerton, New York has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 2.8 °C (low) to 15.1 °C (high). Annual precipitation averages 1169.7 Millimeters. Millerton is located in USDA Plant Hardiness Zone 6a. The growing season typically runs from the last frost around May 1 - May 10 through the first frost around Oct. 11 - Oct. 20.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -9.8 °C | 1.1 °C | 80.01 mm |
| February | -8.9 °C | 2.9 °C | 65.02 mm |
| March | -4.3 °C | 7.3 °C | 86.11 mm |
| April | 1.4 °C | 14.9 °C | 88.65 mm |
| May | 7.2 °C | 21.2 °C | 96.27 mm |
| June | 12.3 °C | 25.4 °C | 116.08 mm |
| July | 15.1 °C | 28.4 °C | 120.14 mm |
| August | 14.2 °C | 27.3 °C | 106.93 mm |
| September | 10 °C | 23 °C | 114.3 mm |
| October | 3.7 °C | 16.4 °C | 119.13 mm |
| November | -1.5 °C | 9.9 °C | 83.31 mm |
| December | -6.1 °C | 3.7 °C | 93.73 mm |
| Annual | 2.8 °C | 15.1 °C | 1169.68 mm |
| Average First Frost Date | Oct. 11 - Oct. 20 |
| Average Last Frost Date | May 1 - May 10 |
| 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 | Moderate Drought |
| Köppen Climate Classification | Dfb - Humid Continental Mild Summer, Wet All Year |