| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | 22°F | 41°F | 31°F | 4.0" |
| February | 21°F | 42°F | 31°F | 3.8" |
| March | 28°F | 50°F | 39°F | 5.0" |
| April | 39°F | 63°F | 50°F | 4.7" |
| May | 48°F | 71°F | 59°F | 3.7" |
| June | 58°F | 80°F | 68°F | 4.8" |
| July | 65°F | 86°F | 75°F | 4.0" |
| August | 63°F | 84°F | 73°F | 3.6" |
| September | 56°F | 78°F | 66°F | 4.3" |
| October | 46°F | 67°F | 56°F | 5.9" |
| November | 36°F | 56°F | 45°F | 4.4" |
| December | 27°F | 46°F | 36°F | 5.2" |
| Index | Mount Hope | Providence | Rhode Island |
| Air quality index | 45 | 45 | 45 |
| Pollution index | 8,312,000 | 8,312,000 | 4,656,140 |
| 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 | 0.010% |
| Benzene | 0.090% |
| Carbon Tetrachloride | 0.040% |
| Lead | 0.210% |
| Mercury | 0.060% |
| City, State | Population | Air Quality Index | National Avg. |
| Mansfield Center, MA | 7,763 | 45 | 10% |
| Somerset, MA | 18,279 | 45 | 10% |
| Cranston, RI | 80,882 | 45 | 10% |
| Harmony, RI | 909 | 45 | 10% |
| Warwick, RI | 81,881 | 45 | 10% |
| Providence, RI | 178,851 | 45 | 10% |
| City, State | Population | Air Quality Index | National Avg. |
| Santa Clarita, CA | 180,303 | 74 | 48% |
| Newport News, VA | 181,606 | 39 | 22% |
| Port St. Lucie, FL | 175,652 | 29 | 42% |
| Brownsville, TX | 182,110 | 41 | 18% |
| Chattanooga, TN | 175,462 | 44 | 12% |
| Providence, RI | 178,851 | 45 | 10% |