| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | 19°F | 34°F | 26°F | 4.0" |
| February | 20°F | 34°F | 27°F | 4.2" |
| March | 27°F | 44°F | 35°F | 5.1" |
| April | 39°F | 59°F | 48°F | 4.9" |
| May | 48°F | 67°F | 56°F | 4.2" |
| June | 58°F | 75°F | 66°F | 5.3" |
| July | 63°F | 80°F | 71°F | 6.2" |
| August | 62°F | 79°F | 70°F | 3.6" |
| September | 55°F | 72°F | 63°F | 4.3" |
| October | 44°F | 60°F | 51°F | 7.5" |
| November | 35°F | 50°F | 42°F | 5.1" |
| December | 24°F | 37°F | 30°F | 4.7" |
| Index | West Brookfield | Massachusetts | National |
| Air quality index | 40 | 40 | 42 |
| Pollution index | 7,859,360 | 8,399,610 | 2,726,193 |
| Measurement | Total |
| Days measured | 365 |
| Days with good air quality | 312 |
| Days with moderate air quality | 52 |
| Days w/ poor A.Q. for sensitive groups | 1 |
| 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. |
| Holland, MA | 1,430 | 40 | 20.0% |
| Oxford, MA | 5,926 | 40 | 20.0% |
| Belchertown, MA | 3,037 | 40 | 20.0% |
| Spencer, MA | 5,810 | 40 | 20.0% |
| Barre, MA | 950 | 40 | 20.0% |
| West Brookfield, MA | 1,511 | 40 | 20.0% |
| City | Population | Air Quality Index | National Avg. |
| Dobson, NC | 1,511 | 45 | 10.0% |
| Albion, NE | 1,511 | 19 | 62.0% |
| St. Stephen, SC | 1,511 | 14 | 72.0% |
| Westlake, TX | 1,511 | 51 | 2.0% |
| Delft Colony, CA | 1,512 | 66 | 32.0% |
| West Brookfield, MA | 1,511 | 40 | 20.0% |
Here are the best places to live in Massachusetts
See the best places to live in West Brookfield
Check out the 10 most dangerous cities in Massachusetts
These are the largest cities in Massachusetts