North Plymouth, Massachusetts has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 5.8 °C (low) to 15.6 °C (high). Annual precipitation averages 1331.7 Millimeters. 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 | -5.4 °C | 3.8 °C | 114.05 mm |
| February | -4.9 °C | 4.6 °C | 103.38 mm |
| March | -1.6 °C | 7.9 °C | 145.29 mm |
| April | 3.4 °C | 13.8 °C | 116.33 mm |
| May | 8.8 °C | 19.2 °C | 95 mm |
| June | 14 °C | 24.3 °C | 98.81 mm |
| July | 17.6 °C | 27.7 °C | 89.66 mm |
| August | 16.9 °C | 26.7 °C | 93.98 mm |
| September | 13.3 °C | 23.2 °C | 106.68 mm |
| October | 7.6 °C | 17.3 °C | 122.17 mm |
| November | 2.4 °C | 11.8 °C | 117.86 mm |
| December | -2.1 °C | 6.8 °C | 128.52 mm |
| Annual | 5.8 °C | 15.6 °C | 1331.73 mm |
| 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 : -17.8°C to -15°C |
| Plant Hardiness Zone - 2012 | Zone 6b : -20.6°C to -17.8°C |
| Current Drought Conditions | Severe Drought |
| Köppen Climate Classification | Dfb - Humid Continental Mild Summer, Wet All Year |