Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
January | 17°F | 37°F | 27°F | 0.8" |
February | 17°F | 40°F | 28°F | 0.7" |
March | 25°F | 50°F | 36°F | 0.8" |
April | 31°F | 58°F | 43°F | 2.5" |
May | 38°F | 66°F | 52°F | 2.5" |
June | 46°F | 76°F | 61°F | 2.6" |
July | 53°F | 89°F | 71°F | 1.1" |
August | 51°F | 86°F | 68°F | 1.2" |
September | 44°F | 75°F | 58°F | 1.6" |
October | 35°F | 60°F | 46°F | 1.2" |
November | 25°F | 47°F | 35°F | 0.9" |
December | 15°F | 34°F | 24°F | 1.2" |
Index | Sun Prairie | Montana | National |
Air quality index | 21 | 34 | 42 |
Pollution index | 250,374 | 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 | 0.000% |
Mercury | 0.000% |
City | Population | Air Quality Index | National Avg. |
Malmstrom AFB, MT | 3,902 | 21 | 58.0% |
Ulm, MT | 750 | 21 | 58.0% |
Black Eagle, MT | 836 | 21 | 58.0% |
Sand Coulee, MT | 201 | 21 | 58.0% |
Vaughn, MT | 877 | 21 | 58.0% |
Sun Prairie, MT | 1,617 | 21 | 58.0% |
City | Population | Air Quality Index | National Avg. |
Kremmling, CO | 1,618 | 47 | 6.0% |
Port Gibson, MS | 1,616 | 44 | 12.0% |
Cherokee, OK | 1,618 | 40 | 20.0% |
Cleora, OK | 1,616 | 38 | 24.0% |
Langhorne, PA | 1,616 | 41 | 18.0% |
Sun Prairie, MT | 1,617 | 21 | 58.0% |