| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | 25°F | 38°F | 31°F | 1.0" |
| February | 25°F | 39°F | 31°F | 0.3" |
| March | 31°F | 46°F | 38°F | 0.8" |
| April | 42°F | 57°F | 49°F | 7.7" |
| May | 51°F | 66°F | 58°F | 5.5" |
| June | 60°F | 74°F | 66°F | 4.3" |
| July | 67°F | 81°F | 73°F | 1.5" |
| August | 65°F | 80°F | 72°F | 1.9" |
| September | 60°F | 73°F | 66°F | 1.6" |
| October | 50°F | 63°F | 56°F | 6.6" |
| November | 40°F | 52°F | 45°F | 0.6" |
| December | 31°F | 43°F | 36°F | 0.4" |
| Index | Tiverton | Rhode Island | National |
| Air quality index | 45 | 45 | 50 |
| Pollution index | 2,165,310 | 4,656,140 | 5,066,862 |
| Measurement | Total |
| Days measured | 365 |
| Days with good air quality | 234 |
| Days with moderate air quality | 122 |
| Days w/ poor A.Q. for sensitive groups | 9 |
| Days with unhealthy air quality |
| Pollutant | Total |
| Arsenic | 0.002% |
| Benzene | 0.020% |
| Carbon Tetrachloride | 0.004% |
| Lead | 0.010% |
| Mercury | 0.003% |
| City, State | Population | Air Quality Index | National Avg. |
| New Bedford, MA | 94,988 | 45 | 10% |
| Somerset, MA | 18,279 | 45 | 10% |
| Narragansett Pier, RI | 3,708 | 45 | 10% |
| Wakefield-Peacedale, RI | 8,904 | 45 | 10% |
| North Westport, MA | 4,694 | 45 | 10% |
| Tiverton, RI | 7,486 | 45 | 10% |
| City, State | Population | Air Quality Index | National Avg. |
| Catoosa, OK | 7,487 | 48 | 4% |
| Oak Grove, KY | 7,487 | 41 | 18% |
| Monahans, TX | 7,484 | 30 | 40% |
| Palmyra, PA | 7,481 | 43 | 14% |
| Sandwich, IL | 7,491 | 1 | 98% |
| Tiverton, RI | 7,486 | 45 | 10% |