Sackets Harbor, New York has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 38 °F (low) to 54.4 °F (high). Annual precipitation averages 41.7 Inches. Sackets Harbor is located in USDA Plant Hardiness Zone 5b. 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 | 12.8 °F | 28.5 °F | 3.71 in. |
| February | 13.3 °F | 30.1 °F | 2.83 in. |
| March | 22.3 °F | 38.4 °F | 2.88 in. |
| April | 34.4 °F | 52.4 °F | 3.47 in. |
| May | 45.9 °F | 64.5 °F | 3.11 in. |
| June | 55.9 °F | 73.6 °F | 3.31 in. |
| July | 61.7 °F | 78.5 °F | 3.03 in. |
| August | 60.6 °F | 77.4 °F | 3.28 in. |
| September | 53.1 °F | 70.6 °F | 3.58 in. |
| October | 42.6 °F | 58.0 °F | 4.67 in. |
| November | 32.0 °F | 46.2 °F | 3.97 in. |
| December | 21.5 °F | 35.0 °F | 3.9 in. |
| Annual | 38 °F | 54.4 °F | 41.74 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 5b : -15°F to -10°F |
| Plant Hardiness Zone - 2012 | Zone 4b : -25°F to -20°F |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Dfb - Humid Continental Mild Summer, Wet All Year |