| 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 | Brockton | Massachusetts | National |
| Air quality index | 43 | 40 | 42 |
| Pollution index | 8,312,000 | 8,399,610 | 2,726,193 |
| 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 | 0.090% |
| Carbon Tetrachloride | 0.040% |
| Lead | 0.210% |
| Mercury | 0.060% |
| City | Population | Air Quality Index | National Avg. |
| Braintree Town, MA | 37,196 | 43 | 14.0% |
| Holbrook, MA | 11,051 | 43 | 14.0% |
| North Scituate, MA | 5,372 | 43 | 14.0% |
| Scituate, MA | 5,905 | 43 | 14.0% |
| Weymouth Town, MA | 57,213 | 43 | 14.0% |
| Brockton, MA | 95,740 | 43 | 14.0% |
| City | Population | Air Quality Index | National Avg. |
| Compton, CA | 95,804 | 72 | 44.0% |
| Chilliwack, BC | 95,663 | n/a | |
| Mission Viejo, CA | 95,638 | 89 | 78.0% |
| Riverview, FL | 95,849 | 43 | 14.0% |
| Longmont, CO | 95,864 | 47 | 6.0% |
| Brockton, MA | 95,740 | 43 | 14.0% |
Here are the best places to live in Massachusetts
Most Dangerous States In The US
These are the 10 cheapest cities in Massachusetts
Check out the 10 safest cities in Massachusetts