| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | 10°F | 25°F | 17°F | 2.1" |
| February | 10°F | 26°F | 18°F | 1.6" |
| March | 18°F | 36°F | 27°F | 2.1" |
| April | 31°F | 50°F | 40°F | 2.8" |
| May | 42°F | 65°F | 52°F | 2.5" |
| June | 51°F | 73°F | 61°F | 3.1" |
| July | 56°F | 78°F | 66°F | 3.1" |
| August | 56°F | 76°F | 65°F | 3.7" |
| September | 50°F | 70°F | 59°F | 4.3" |
| October | 40°F | 56°F | 47°F | 4.6" |
| November | 29°F | 43°F | 36°F | 3.8" |
| December | 17°F | 30°F | 23°F | 3.5" |
| Index | Sault Ste. Marie | Michigan | National |
| Air quality index | 32 | 69 | 42 |
| Pollution index | 2,221,050 | 4,161,606 | 2,726,193 |
| Measurement | Total |
| Days measured | 58 |
| Days with good air quality | 53 |
| Days with moderate air quality | 5 |
| Days w/ poor A.Q. for sensitive groups | 0 |
| Days with unhealthy air quality | 0 |
| Pollutant | Total |
| Arsenic | 0.040% |
| Benzene | 0.020% |
| Carbon Tetrachloride | 0.002% |
| Lead | 0.010% |
| Mercury | 0.003% |
| City | Population | Air Quality Index | National Avg. |
| Sault Ste. Marie, MI | 13,819 | 32 | 36.0% |
| City | Population | Air Quality Index | National Avg. |
| Matane, QC | 13,814 | n/a | |
| Prévost, QC | 13,814 | n/a | |
| Lone Tree, CO | 13,829 | 58 | 16.0% |
| Bonnyville No. 87, AB | 13,832 | n/a | |
| Beaufort, SC | 13,805 | 29 | 42.0% |
| Sault Ste. Marie, MI | 13,819 | 32 | 36.0% |