| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | 22°F | 41°F | 31°F | 3.8" |
| February | 22°F | 41°F | 31°F | 3.2" |
| March | 29°F | 48°F | 38°F | 4.5" |
| April | 38°F | 59°F | 48°F | 4.5" |
| May | 48°F | 69°F | 58°F | 4.0" |
| June | 56°F | 77°F | 66°F | 4.5" |
| July | 63°F | 84°F | 73°F | 4.1" |
| August | 60°F | 82°F | 71°F | 4.8" |
| September | 54°F | 75°F | 64°F | 4.0" |
| October | 44°F | 65°F | 55°F | 5.5" |
| November | 35°F | 55°F | 45°F | 4.0" |
| December | 28°F | 46°F | 37°F | 5.0" |
| Index | North Westport | Massachusetts | National |
| Air quality index | 44 | 40 | 42 |
| Pollution index | 121,216 | 8,399,610 | 2,726,193 |
| Measurement | Total |
| Days measured | 365 |
| Days with good air quality | 289 |
| Days with moderate air quality | 74 |
| Days w/ poor A.Q. for sensitive groups | 2 |
| Days with unhealthy air quality | 0 |
| Pollutant | Total |
| Arsenic | 0.000% |
| Benzene | 0.002% |
| Carbon Tetrachloride | 0.000% |
| Lead | 0.000% |
| Mercury | 0.000% |
| City | Population | Air Quality Index | National Avg. |
| North Lakeville, MA | 3,226 | 44 | 12.0% |
| Newport East, RI | 11,289 | 44 | 12.0% |
| Central Falls, RI | 19,437 | 44 | 12.0% |
| Acushnet Center, MA | 3,403 | 44 | 12.0% |
| Smith Mills, MA | 4,706 | 44 | 12.0% |
| North Westport, MA | 4,787 | 44 | 12.0% |
| City | Population | Air Quality Index | National Avg. |
| East Merrimack, NH | 4,786 | 37 | 26.0% |
| Colville, WA | 4,786 | 43 | 14.0% |
| Westlake, LA | 4,788 | 45 | 10.0% |
| Wrightsboro, NC | 4,788 | 34 | 32.0% |
| Farmington, ME | 4,785 | 28 | 44.0% |
| North Westport, MA | 4,787 | 44 | 12.0% |
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