| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | 19°F | 28°F | 23°F | 4.8" |
| February | 19°F | 30°F | 24°F | 4.6" |
| March | 23°F | 34°F | 27°F | 6.5" |
| April | 27°F | 41°F | 32°F | 3.4" |
| May | 35°F | 52°F | 42°F | 2.7" |
| June | 42°F | 60°F | 49°F | 3.5" |
| July | 53°F | 72°F | 61°F | 1.0" |
| August | 51°F | 71°F | 59°F | 1.0" |
| September | 44°F | 61°F | 50°F | 1.6" |
| October | 32°F | 45°F | 37°F | 4.2" |
| November | 23°F | 33°F | 27°F | 6.4" |
| December | 16°F | 25°F | 21°F | 6.1" |
| Index | Noxon | Montana | National |
| Air quality index | 37 | 34 | 42 |
| Pollution index | 4,670,990 | 834,473 | 2,726,193 |
| Measurement | Total |
| Days measured | 365 |
| Days with good air quality | 302 |
| Days with moderate air quality | 62 |
| Days w/ poor A.Q. for sensitive groups | 1 |
| Days with unhealthy air quality | 0 |
| Pollutant | Total |
| Arsenic | 0.050% |
| Benzene | 0.060% |
| Carbon Tetrachloride | 0.010% |
| Lead | 0.060% |
| Mercury | 0.003% |
| City | Population | Air Quality Index | National Avg. |
| Trout Creek, MT | 205 | 37 | 26.0% |
| Heron, MT | 281 | 43 | 14.0% |
| Noxon, MT | 162 | 37 | 26.0% |
| City | Population | Air Quality Index | National Avg. |
| Beatrice, AL | 162 | 52 | 4.0% |
| Chapin, IA | 162 | 15 | 70.0% |
| Colburn, IN | 162 | 42 | 16.0% |
| Tampa, KS | 162 | 22 | 56.0% |
| Nebo, KY | 162 | 43 | 14.0% |
| Noxon, MT | 162 | 37 | 26.0% |
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