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 | Butte-Silver Bow | Montana | National |
Air quality index | 20 | 34 | 42 |
Pollution index | 568,053 | 834,473 | 2,726,193 |
Measurement | Total |
Days measured | 363 |
Days with good air quality | 319 |
Days with moderate air quality | 44 |
Days w/ poor A.Q. for sensitive groups | 0 |
Days with unhealthy air quality | 0 |
Pollutant | Total |
Arsenic | 0.000% |
Benzene | 0.010% |
Carbon Tetrachloride | 0.002% |
Lead | 0.003% |
Mercury | 0.000% |
City | Population | Air Quality Index | National Avg. |
Walkerville, MT | 632 | 20 | 60.0% |
Anaconda-Deer Lodge County, MT | 9,153 | 20 | 60.0% |
Butte-Silver Bow, MT | 34,263 | 20 | 60.0% |
City | Population | Air Quality Index | National Avg. |
Torrington, CT | 34,259 | 37 | 26.0% |
Wenatchee, WA | 34,249 | 24 | 52.0% |
Adelanto, CA | 34,238 | 89 | 78.0% |
Kennesaw, GA | 34,232 | 52 | 4.0% |
Chillum, MD | 34,230 | 47 | 6.0% |
Butte-Silver Bow, MT | 34,263 | 20 | 60.0% |