Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
January | 9°F | 33°F | 20°F | 0.4" |
February | 12°F | 37°F | 23°F | 0.4" |
March | 20°F | 44°F | 31°F | 0.6" |
April | 26°F | 52°F | 38°F | 1.4" |
May | 34°F | 62°F | 47°F | 2.2" |
June | 41°F | 71°F | 55°F | 2.8" |
July | 46°F | 84°F | 65°F | 1.0" |
August | 43°F | 80°F | 61°F | 1.2" |
September | 36°F | 71°F | 52°F | 1.3" |
October | 28°F | 54°F | 39°F | 1.4" |
November | 19°F | 42°F | 30°F | 0.5" |
December | 7°F | 29°F | 17°F | 0.5" |
Index | Basin | Montana | National |
Air quality index | 40 | 34 | 42 |
Pollution index | 160,256 | 834,473 | 2,726,193 |
Measurement | Total |
Days measured | 365 |
Days with good air quality | 288 |
Days with moderate air quality | 75 |
Days w/ poor A.Q. for sensitive groups | 2 |
Days with unhealthy air quality | 0 |
Pollutant | Total |
Arsenic | 0.000% |
Benzene | 0.003% |
Carbon Tetrachloride | 0.001% |
Lead | 0.002% |
Mercury | 0.000% |
City | Population | Air Quality Index | National Avg. |
Boulder, MT | 1,027 | 40 | 20.0% |
Clancy, MT | 1,964 | 40 | 20.0% |
Jefferson City, MT | 596 | 40 | 20.0% |
Basin, MT | 267 | 40 | 20.0% |
City | Population | Air Quality Index | National Avg. |
Manchester, CA | 267 | 33 | 34.0% |
No Name, CO | 267 | 44 | 12.0% |
Cantril, IA | 267 | 29 | 42.0% |
Allerton, IL | 267 | 42 | 16.0% |
Compton, IL | 267 | 0 | 100.0% |
Basin, MT | 267 | 40 | 20.0% |