Duxbury, Massachusetts has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 43.1 °F (low) to 59.6 °F (high). Annual precipitation averages 52.1 Inches. Duxbury is located in USDA Plant Hardiness Zone 7a. 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 | 22.9 °F | 38.4 °F | 4.42 in. |
| February | 24.1 °F | 40.2 °F | 4.01 in. |
| March | 29.6 °F | 45.8 °F | 5.58 in. |
| April | 38.7 °F | 55.7 °F | 4.59 in. |
| May | 48.4 °F | 66.1 °F | 3.71 in. |
| June | 57.8 °F | 75.2 °F | 3.89 in. |
| July | 64.2 °F | 81.2 °F | 3.45 in. |
| August | 63.0 °F | 79.4 °F | 3.66 in. |
| September | 56.6 °F | 73.2 °F | 4.17 in. |
| October | 46.2 °F | 62.7 °F | 4.93 in. |
| November | 36.8 °F | 52.8 °F | 4.6 in. |
| December | 29.0 °F | 44.0 °F | 5.06 in. |
| Annual | 43.1 °F | 59.6 °F | 52.07 in. |
| Average First Frost Date | Oct. 11 - Oct. 20 |
| Average Last Frost Date | Apr. 21 - Apr. 30 |
| Average Days With Frost | 100-125 Days |
| Plant Hardiness Zone | Zone 7a : 0°F to 5°F |
| Plant Hardiness Zone - 2012 | Zone 6b : -5°F to 0°F |
| Current Drought Conditions | Severe Drought |
| Köppen Climate Classification | Dfa - Humid Continental Hot Summers With Year Around Precipitation |