Millport, New York has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 37.2 °F (low) to 58.7 °F (high). Annual precipitation averages 35.7 Inches. Millport 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. 1 - Oct. 10.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 15.8 °F | 33.1 °F | 2.02 in. |
| February | 16.6 °F | 35.6 °F | 1.73 in. |
| March | 23.6 °F | 43.8 °F | 2.57 in. |
| April | 33.7 °F | 57.7 °F | 3.13 in. |
| May | 44.8 °F | 69.9 °F | 2.99 in. |
| June | 54.0 °F | 78.0 °F | 3.85 in. |
| July | 58.5 °F | 82.8 °F | 3.69 in. |
| August | 57.3 °F | 81.3 °F | 3.58 in. |
| September | 50.2 °F | 73.9 °F | 3.75 in. |
| October | 39.4 °F | 61.3 °F | 3.46 in. |
| November | 30.2 °F | 48.9 °F | 2.54 in. |
| December | 22.6 °F | 37.9 °F | 2.36 in. |
| Annual | 37.2 °F | 58.7 °F | 35.67 in. |
| 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 6a : -10°F to -5°F |
| Plant Hardiness Zone - 2012 | Zone 6a : -10°F to -5°F |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Dfb - Humid Continental Mild Summer, Wet All Year |