Nantucket, Massachusetts has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 45.7 °F (low) to 57.1 °F (high). Annual precipitation averages 46.4 Inches. Nantucket is located in USDA Plant Hardiness Zone 7b. The growing season typically runs from the last frost around Apr. 11 - Apr. 20 through the first frost around Nov. 1 - Nov. 10.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 26.9 °F | 39.3 °F | 4.18 in. |
| February | 27.5 °F | 39.5 °F | 3.69 in. |
| March | 32.3 °F | 43.5 °F | 5.02 in. |
| April | 40.4 °F | 51.7 °F | 4.36 in. |
| May | 48.7 °F | 60.2 °F | 3.02 in. |
| June | 57.6 °F | 68.6 °F | 2.86 in. |
| July | 64.8 °F | 75.8 °F | 2.53 in. |
| August | 65.0 °F | 75.8 °F | 3.16 in. |
| September | 60.0 °F | 70.8 °F | 3.75 in. |
| October | 50.6 °F | 61.6 °F | 4.68 in. |
| November | 41.3 °F | 52.9 °F | 4.16 in. |
| December | 32.9 °F | 45.0 °F | 4.99 in. |
| Annual | 45.7 °F | 57.1 °F | 46.4 in. |
| Average First Frost Date | Nov. 1 - Nov. 10 |
| Average Last Frost Date | Apr. 11 - Apr. 20 |
| Average Days With Frost | 75-100 Days |
| Plant Hardiness Zone | Zone 7b : 5°F to 10°F |
| Plant Hardiness Zone - 2012 | Zone 7a : 0°F to 5°F |
| Current Drought Conditions | Severe Drought |
| Köppen Climate Classification | Dfb - Humid Continental Mild Summer, Wet All Year |