| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | 7°F | 24°F | 16°F | 1.7" |
| February | 8°F | 27°F | 17°F | 0.3" |
| March | 17°F | 41°F | 28°F | 1.3" |
| April | 28°F | 57°F | 42°F | 1.4" |
| May | 41°F | 68°F | 54°F | 1.4" |
| June | 52°F | 81°F | 67°F | 4.3" |
| July | 54°F | 83°F | 69°F | 4.5" |
| August | 54°F | 80°F | 67°F | 4.1" |
| September | 48°F | 75°F | 61°F | 4.4" |
| October | 41°F | 61°F | 49°F | 7.3" |
| November | 23°F | 40°F | 32°F | 1.4" |
| December | 11°F | 27°F | 20°F | 1.8" |
| Index | Dunbar | Wisconsin | National |
| Air quality index | 36 | 69 | 42 |
| Pollution index | 1,372,730 | 2,842,418 | 2,726,193 |
| Measurement | Total |
| Days measured | 365 |
| Days with good air quality | 311 |
| Days with moderate air quality | 54 |
| Days w/ poor A.Q. for sensitive groups | 0 |
| Days with unhealthy air quality | 0 |
| Pollutant | Total |
| Arsenic | 0.001% |
| Benzene | 0.010% |
| Carbon Tetrachloride | 0.002% |
| Lead | 0.010% |
| Mercury | 0.010% |
| City | Population | Air Quality Index | National Avg. |
| Goodman, WI | 276 | 34 | 32.0% |
| Norway, MI | 2,744 | 36 | 28.0% |
| Pembine, WI | 203 | 36 | 28.0% |
| Quinnesec, MI | 1,203 | 36 | 28.0% |
| Iron Mountain, MI | 7,352 | 36 | 28.0% |
| Dunbar, WI | 56 | 36 | 28.0% |
| City | Population | Air Quality Index | National Avg. |
| Hughes, AK | 56 | 38 | 24.0% |
| Northway Junction, AK | 56 | 38 | 24.0% |
| Shageluk, AK | 56 | 31 | 38.0% |
| Beedeville, AR | 56 | 45 | 10.0% |
| Aspen Springs, CA | 56 | 47 | 6.0% |
| Dunbar, WI | 56 | 36 | 28.0% |
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