North Plymouth, Massachusetts has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 42.5 °F (low) to 60.1 °F (high). Annual precipitation averages 52.4 Inches. North Plymouth 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 | 22.3 °F | 38.8 °F | 4.49 in. |
| February | 23.2 °F | 40.2 °F | 4.07 in. |
| March | 29.1 °F | 46.3 °F | 5.72 in. |
| April | 38.1 °F | 56.8 °F | 4.58 in. |
| May | 47.8 °F | 66.6 °F | 3.74 in. |
| June | 57.2 °F | 75.8 °F | 3.89 in. |
| July | 63.7 °F | 81.8 °F | 3.53 in. |
| August | 62.5 °F | 80.1 °F | 3.7 in. |
| September | 55.9 °F | 73.7 °F | 4.2 in. |
| October | 45.6 °F | 63.1 °F | 4.81 in. |
| November | 36.4 °F | 53.2 °F | 4.64 in. |
| December | 28.3 °F | 44.3 °F | 5.06 in. |
| Annual | 42.5 °F | 60.1 °F | 52.43 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 | Dfb - Humid Continental Mild Summer, Wet All Year |