Port Dickinson, New York has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 37.7 °F (low) to 57.9 °F (high). Annual precipitation averages 41.6 Inches. Port Dickinson is located in USDA Plant Hardiness Zone 6a. The growing season typically runs from the last frost around Apr. 21 - Apr. 30 through the first frost around Oct. 11 - Oct. 20.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 15.9 °F | 31.8 °F | 2.82 in. |
| February | 16.6 °F | 34.0 °F | 2.29 in. |
| March | 23.5 °F | 43.3 °F | 3.18 in. |
| April | 34.3 °F | 57.1 °F | 3.53 in. |
| May | 45.6 °F | 69.4 °F | 3.5 in. |
| June | 54.7 °F | 78.0 °F | 4.03 in. |
| July | 59.4 °F | 81.3 °F | 4.07 in. |
| August | 58.2 °F | 80.5 °F | 4.17 in. |
| September | 51.2 °F | 73.3 °F | 3.96 in. |
| October | 40.0 °F | 61.0 °F | 3.98 in. |
| November | 30.4 °F | 47.2 °F | 3.0 in. |
| December | 23.1 °F | 37.3 °F | 3.1 in. |
| Annual | 37.7 °F | 57.9 °F | 41.63 in. |
| Average First Frost Date | Oct. 11 - Oct. 20 |
| Average Last Frost Date | Apr. 21 - Apr. 30 |
| Average Days With Frost | 125-150 Days |
| Plant Hardiness Zone | Zone 6a : -10°F to -5°F |
| Plant Hardiness Zone - 2012 | Zone 5b : -15°F to -10°F |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Dfb - Humid Continental Mild Summer, Wet All Year |