| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | 19°F | 32°F | 25°F | 5.8" |
| February | 18°F | 33°F | 25°F | 2.4" |
| March | 28°F | 45°F | 36°F | 5.0" |
| April | 38°F | 59°F | 48°F | 6.1" |
| May | 49°F | 70°F | 59°F | 5.6" |
| June | 58°F | 79°F | 68°F | 3.4" |
| July | 62°F | 82°F | 72°F | 6.3" |
| August | 60°F | 80°F | 70°F | 2.1" |
| September | 53°F | 73°F | 62°F | 1.6" |
| October | 43°F | 61°F | 51°F | 7.7" |
| November | 33°F | 48°F | 40°F | 4.6" |
| December | 24°F | 36°F | 30°F | 0.7" |
| Index | Brighton | Michigan | National |
| Air quality index | 40 | 69 | 42 |
| Pollution index | 180,667 | 4,161,606 | 2,726,193 |
| Measurement | Total |
| Days measured | 365 |
| Days with good air quality | 292 |
| Days with moderate air quality | 73 |
| Days w/ poor A.Q. for sensitive groups | 0 |
| Days with unhealthy air quality | 0 |
| Pollutant | Total |
| Arsenic | 0.000% |
| Benzene | 0.002% |
| Carbon Tetrachloride | 0.001% |
| Lead | 0.000% |
| Mercury | 0.000% |
| City | Population | Air Quality Index | National Avg. |
| Fowlerville, MI | 2,965 | 36 | 28.0% |
| Whitmore Lake, MI | 8,299 | 40 | 20.0% |
| Howell, MI | 9,917 | 40 | 20.0% |
| Wixom, MI | 14,439 | 40 | 20.0% |
| Milford, MI | 6,722 | 40 | 20.0% |
| Brighton, MI | 7,828 | 40 | 20.0% |
| City | Population | Air Quality Index | National Avg. |
| Newport, AR | 7,828 | 45 | 10.0% |
| Southgate, ON | 7,828 | n/a | |
| River Oaks, TX | 7,830 | 33 | 34.0% |
| Decorah, IA | 7,825 | 35 | 30.0% |
| Park City, KS | 7,834 | 40 | 20.0% |
| Brighton, MI | 7,828 | 40 | 20.0% |