| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | 16°F | 36°F | 27°F | 5.4" |
| February | 16°F | 38°F | 27°F | 5.5" |
| March | 26°F | 48°F | 37°F | 6.7" |
| April | 36°F | 62°F | 49°F | 5.7" |
| May | 46°F | 73°F | 60°F | 6.3" |
| June | 55°F | 79°F | 67°F | 7.6" |
| July | 61°F | 85°F | 73°F | 7.3" |
| August | 58°F | 83°F | 71°F | 8.2" |
| September | 51°F | 77°F | 64°F | 7.9" |
| October | 41°F | 65°F | 52°F | 8.1" |
| November | 30°F | 53°F | 41°F | 5.8" |
| December | 23°F | 41°F | 32°F | 6.5" |
| Index | Springfield | Massachusetts | National |
| Air quality index | 40 | 40 | 42 |
| Pollution index | 7,859,360 | 8,399,610 | 2,726,193 |
| Measurement | Total |
| Days measured | 364 |
| Days with good air quality | 305 |
| Days with moderate air quality | 59 |
| Days w/ poor A.Q. for sensitive groups | 0 |
| Days with unhealthy air quality | 0 |
| Pollutant | Total |
| Arsenic | 0.030% |
| Benzene | 0.070% |
| Carbon Tetrachloride | 0.030% |
| Lead | 0.320% |
| Mercury | 0.070% |
| City | Population | Air Quality Index | National Avg. |
| Crystal Lake, CT | 2,567 | 40 | 20.0% |
| Somers, CT | 2,343 | 40 | 20.0% |
| Thompsonville, CT | 8,563 | 40 | 20.0% |
| Westfield, MA | 41,303 | 40 | 20.0% |
| Holyoke, MA | 40,161 | 40 | 20.0% |
| Springfield, MA | 153,677 | 40 | 20.0% |
| City | Population | Air Quality Index | National Avg. |
| Hollywood, FL | 153,834 | 41 | 18.0% |
| Palmdale, CA | 153,240 | 72 | 44.0% |
| Macon-Bibb County, GA | 153,026 | 38 | 24.0% |
| Kansas City, KS | 153,014 | 47 | 6.0% |
| Sunnyvale, CA | 152,569 | 43 | 14.0% |
| Springfield, MA | 153,677 | 40 | 20.0% |
Here are the best places to live in Massachusetts
Most Dangerous Cities In The US
Check out the 10 safest cities in Massachusetts
See the best places to live in Springfield