Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
January | 16°F | 34°F | 25°F | 0.9" |
February | 21°F | 40°F | 30°F | 1.0" |
March | 26°F | 51°F | 38°F | 1.0" |
April | 31°F | 60°F | 44°F | 1.1" |
May | 38°F | 69°F | 53°F | 1.4" |
June | 45°F | 78°F | 61°F | 2.0" |
July | 51°F | 91°F | 71°F | 0.6" |
August | 49°F | 88°F | 68°F | 0.7" |
September | 42°F | 77°F | 58°F | 1.0" |
October | 33°F | 59°F | 45°F | 1.2" |
November | 24°F | 44°F | 33°F | 1.4" |
December | 15°F | 32°F | 24°F | 1.2" |
Index | Riverbend | Montana | National |
Air quality index | 40 | 34 | 42 |
Pollution index | 848,303 | 834,473 | 2,726,193 |
Measurement | Total |
Days measured | 365 |
Days with good air quality | 224 |
Days with moderate air quality | 137 |
Days w/ poor A.Q. for sensitive groups | 3 |
Days with unhealthy air quality | 1 |
Pollutant | Total |
Arsenic | 0.000% |
Benzene | 0.020% |
Carbon Tetrachloride | 0.002% |
Lead | 0.010% |
Mercury | 0.000% |
City | Population | Air Quality Index | National Avg. |
Superior, MT | 733 | 40 | 20.0% |
St. Regis, MT | 207 | 40 | 20.0% |
Riverbend, MT | 332 | 40 | 20.0% |
City | Population | Air Quality Index | National Avg. |
Bayard, IA | 332 | 37 | 26.0% |
Rowley, IA | 332 | 39 | 22.0% |
Copeland, KS | 332 | 15 | 70.0% |
Salt Lick, KY | 332 | 33 | 34.0% |
Smithland, KY | 332 | 44 | 12.0% |
Riverbend, MT | 332 | 40 | 20.0% |