Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
January | 15°F | 35°F | 24°F | 0.7" |
February | 23°F | 48°F | 35°F | 0.6" |
March | 27°F | 55°F | 40°F | 0.8" |
April | 32°F | 60°F | 45°F | 2.5" |
May | 37°F | 64°F | 50°F | 3.5" |
June | 47°F | 77°F | 62°F | 4.5" |
July | 51°F | 86°F | 69°F | 2.5" |
August | 49°F | 83°F | 66°F | 3.3" |
September | 41°F | 71°F | 55°F | 4.6" |
October | 35°F | 61°F | 47°F | 1.7" |
November | 24°F | 47°F | 35°F | 1.4" |
December | 12°F | 33°F | 22°F | 1.0" |
Index | Sun River | Montana | National |
Air quality index | 21 | 34 | 42 |
Pollution index | 260,100 | 834,473 | 2,726,193 |
Measurement | Total |
Days measured | 363 |
Days with good air quality | 350 |
Days with moderate air quality | 12 |
Days w/ poor A.Q. for sensitive groups | 1 |
Days with unhealthy air quality | 0 |
Pollutant | Total |
Arsenic | 0.000% |
Benzene | 0.004% |
Carbon Tetrachloride | 0.000% |
Lead | 0.002% |
Mercury | 0.000% |
City | Population | Air Quality Index | National Avg. |
Fort Shaw, MT | 138 | 21 | 58.0% |
Vaughn, MT | 877 | 21 | 58.0% |
Simms, MT | 338 | 21 | 58.0% |
Power, MT | 153 | 21 | 58.0% |
Sun Prairie, MT | 1,617 | 21 | 58.0% |
Sun River, MT | 41 | 21 | 58.0% |
City | Population | Air Quality Index | National Avg. |
Tatitlek, AK | 41 | 31 | 38.0% |
Tinsman, AR | 41 | 35 | 30.0% |
Two Buttes, CO | 41 | 20 | 60.0% |
Conway, IA | 41 | 43 | 14.0% |
Irvington, IA | 41 | 15 | 70.0% |
Sun River, MT | 41 | 21 | 58.0% |