Port Ewen, New York has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 40 °F (low) to 61.7 °F (high). Annual precipitation averages 48.2 Inches. Port Ewen is located in USDA Plant Hardiness Zone 6b. The growing season typically runs from the last frost around Apr. 11 - Apr. 20 through the first frost around Oct. 21 - Oct. 31.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 17.1 °F | 36.1 °F | 3.53 in. |
| February | 18.8 °F | 39.1 °F | 2.75 in. |
| March | 26.9 °F | 48.0 °F | 3.68 in. |
| April | 37.8 °F | 61.3 °F | 3.87 in. |
| May | 48.2 °F | 72.6 °F | 3.77 in. |
| June | 57.4 °F | 80.9 °F | 4.26 in. |
| July | 62.3 °F | 85.7 °F | 4.73 in. |
| August | 60.8 °F | 83.6 °F | 4.33 in. |
| September | 53.0 °F | 76.2 °F | 4.79 in. |
| October | 42.0 °F | 63.8 °F | 4.77 in. |
| November | 32.0 °F | 52.0 °F | 3.56 in. |
| December | 23.5 °F | 40.9 °F | 4.16 in. |
| Annual | 40 °F | 61.7 °F | 48.2 in. |
| Average First Frost Date | Oct. 21 - Oct. 31 |
| Average Last Frost Date | Apr. 11 - Apr. 20 |
| Average Days With Frost | 125-150 Days |
| Plant Hardiness Zone | Zone 6b : -5°F to 0°F |
| Plant Hardiness Zone - 2012 | Zone 5b : -15°F to -10°F |
| Current Drought Conditions | Moderate Drought |
| Köppen Climate Classification | Dfb - Humid Continental Mild Summer, Wet All Year |