| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | 20°F | 36°F | 28°F | 5.0" |
| February | 21°F | 38°F | 28°F | 4.7" |
| March | 27°F | 46°F | 35°F | 5.5" |
| April | 39°F | 59°F | 48°F | 4.7" |
| May | 48°F | 68°F | 57°F | 4.3" |
| June | 57°F | 77°F | 66°F | 5.2" |
| July | 64°F | 83°F | 72°F | 4.4" |
| August | 62°F | 81°F | 70°F | 4.4" |
| September | 56°F | 74°F | 64°F | 3.7" |
| October | 45°F | 63°F | 53°F | 7.1" |
| November | 35°F | 52°F | 43°F | 4.1" |
| December | 26°F | 41°F | 33°F | 5.9" |
| Index | Newton | Massachusetts | National |
| Air quality index | 43 | 40 | 50 |
| Pollution index | 7,556,320 | 12,377,839 | 5,066,862 |
| Measurement | Total |
| Days measured | 365 |
| Days with good air quality | 291 |
| Days with moderate air quality | 73 |
| Days w/ poor A.Q. for sensitive groups | 1 |
| Days with unhealthy air quality | 0 |
| Pollutant | Total |
| Arsenic | 0.010% |
| Benzene | 0.070% |
| Carbon Tetrachloride | 0.040% |
| Lead | 0.010% |
| Mercury | 0.040% |
| City, State | Population | Air Quality Index | National Avg. |
| Littleton Common, MA | 3,002 | 40 | 20% |
| Maynard, MA | 10,526 | 40 | 20% |
| Framingham, MA | 70,743 | 40 | 20% |
| Abington, MA | 16,196 | 43 | 14% |
| Dedham, MA | 25,272 | 43 | 14% |
| Newton, MA | 88,317 | 43 | 14% |
| City, State | Population | Air Quality Index | National Avg. |
| Edmond, OK | 88,342 | 48 | 4% |
| Meridian, ID | 88,247 | 36 | 28% |
| Waukegan, IL | 88,159 | 39 | 22% |
| San Tan Valley, AZ | 88,507 | 74 | 48% |
| Toms River, NJ | 88,537 | 41 | 18% |
| Newton, MA | 88,317 | 43 | 14% |
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