| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | n/a°F | n/a°F | n/a°F | n/a |
| February | n/a°F | n/a°F | n/a°F | n/a |
| March | n/a°F | n/a°F | n/a°F | n/a |
| April | n/a°F | n/a°F | n/a°F | n/a |
| May | n/a°F | n/a°F | n/a°F | n/a |
| June | n/a°F | n/a°F | n/a°F | n/a |
| July | n/a°F | n/a°F | n/a°F | n/a |
| August | n/a°F | n/a°F | n/a°F | n/a |
| September | n/a°F | n/a°F | n/a°F | n/a |
| October | n/a°F | n/a°F | n/a°F | n/a |
| November | n/a°F | n/a°F | n/a°F | n/a |
| December | n/a°F | n/a°F | n/a°F | n/a |
| Index | LaSalle | Ontario | National |
| Air quality index | n/a | n/a | 42 |
| Pollution index | n/a | n/a | 2,726,193 |
| Measurement | Total |
| Days measured | |
| Days with good air quality | |
| Days with moderate air quality | |
| Days w/ poor A.Q. for sensitive groups | |
| Days with unhealthy air quality |
| Pollutant | Total |
| Arsenic | n/a% |
| Benzene | n/a% |
| Carbon Tetrachloride | n/a% |
| Lead | n/a% |
| Mercury | n/a% |
| City | Population | Air Quality Index | National Avg. |
| Rockwood, MI | 3,275 | 1 | 98.0% |
| Flat Rock, MI | 10,332 | 1 | 98.0% |
| Woodhaven, MI | 12,963 | 1 | 98.0% |
| Gibraltar, MI | 4,653 | 1 | 98.0% |
| South Rockwood, MI | 1,977 | 1 | 98.0% |
| City | Population | Air Quality Index | National Avg. |
| Walla Walla, WA | 33,841 | 23 | 54.0% |
| Houma, LA | 33,829 | 41 | 18.0% |
| Helena, MT | 33,820 | 40 | 20.0% |
| Lewiston, ID | 33,803 | 29 | 42.0% |
| Pueblo West, CO | 33,798 | 20 | 60.0% |
| LaSalle, ON | 33,838 | n/a |