North Westport, Massachusetts has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 43.8 °F (low) to 60.2 °F (high). Annual precipitation averages 50.1 Inches. North Westport is located in USDA Plant Hardiness Zone 7a. The growing season typically runs from the last frost around Apr. 11 - Apr. 20 through the first frost around Oct. 11 - Oct. 20.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 23.2 °F | 37.9 °F | 4.32 in. |
| February | 24.2 °F | 40.0 °F | 3.68 in. |
| March | 30.2 °F | 46.7 °F | 5.52 in. |
| April | 39.7 °F | 57.3 °F | 4.48 in. |
| May | 49.4 °F | 67.5 °F | 3.46 in. |
| June | 58.9 °F | 76.2 °F | 3.86 in. |
| July | 65.4 °F | 82.3 °F | 3.34 in. |
| August | 63.8 °F | 81.1 °F | 3.64 in. |
| September | 57.6 °F | 74.5 °F | 3.83 in. |
| October | 46.7 °F | 62.9 °F | 4.66 in. |
| November | 37.2 °F | 52.3 °F | 4.31 in. |
| December | 28.9 °F | 43.2 °F | 4.98 in. |
| Annual | 43.8 °F | 60.2 °F | 50.08 in. |
| Average First Frost Date | Oct. 11 - Oct. 20 |
| Average Last Frost Date | Apr. 11 - Apr. 20 |
| 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 |