| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | 25°F | 40°F | 32°F | 2.9" |
| February | 24°F | 40°F | 32°F | 2.5" |
| March | 30°F | 47°F | 38°F | 3.7" |
| April | 40°F | 57°F | 48°F | 3.9" |
| May | 49°F | 66°F | 57°F | 3.4" |
| June | 58°F | 74°F | 65°F | 3.9" |
| July | 65°F | 80°F | 72°F | 3.8" |
| August | 63°F | 79°F | 71°F | 3.0" |
| September | 57°F | 74°F | 65°F | 3.2" |
| October | 48°F | 64°F | 56°F | 4.3" |
| November | 38°F | 54°F | 46°F | 3.3" |
| December | 30°F | 45°F | 38°F | 4.1" |
| Index | Melville | 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% |
| Smith Mills, MA | 4,706 | 44 | 12.0% |
| Kingston, RI | 6,407 | 44 | 12.0% |
| Narragansett Pier, RI | 3,487 | 44 | 12.0% |
| Tiverton, RI | 7,996 | 44 | 12.0% |
| Melville, RI | 1,877 | 44 | 12.0% |
| City | Population | Air Quality Index | National Avg. |
| Chenoa, IL | 1,877 | 44 | 12.0% |
| Falmouth, ME | 1,877 | 40 | 20.0% |
| Durant, IA | 1,878 | 32 | 36.0% |
| Baldwin, LA | 1,876 | 41 | 18.0% |
| Logansport, LA | 1,878 | 39 | 22.0% |
| Melville, RI | 1,877 | 44 | 12.0% |
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