| 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 | 44 | 45 | 42 |
| Pollution index | 2,165,310 | 3,440,259 | 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 | 0.002% |
| Benzene | 0.020% |
| Carbon Tetrachloride | 0.004% |
| Lead | 0.010% |
| Mercury | 0.003% |
| City | Population | Air Quality Index | National Avg. |
| Somerset, MA | 18,160 | 44 | 12.0% |
| Bliss Corner, MA | 5,272 | 44 | 12.0% |
| East Providence, RI | 47,442 | 44 | 12.0% |
| Newport East, RI | 11,289 | 44 | 12.0% |
| Melville, RI | 1,877 | 44 | 12.0% |
| Tiverton, RI | 7,996 | 44 | 12.0% |
| City | Population | Air Quality Index | National Avg. |
| Laughlin, NV | 7,997 | 13 | 74.0% |
| Bluewater, ON | 7,997 | n/a | |
| Richland Hills, TX | 7,999 | 51 | 2.0% |
| Alondra Park, CA | 8,000 | 72 | 44.0% |
| Rolesville, NC | 8,002 | 46 | 8.0% |
| Tiverton, RI | 7,996 | 44 | 12.0% |
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