Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
January | 17°F | 43°F | 29°F | 0.3" |
February | 17°F | 43°F | 29°F | 0.6" |
March | 24°F | 54°F | 38°F | 0.8" |
April | 29°F | 59°F | 43°F | 1.7" |
May | 38°F | 66°F | 51°F | 2.3" |
June | 48°F | 81°F | 64°F | 1.9" |
July | 55°F | 87°F | 70°F | 2.4" |
August | 53°F | 85°F | 68°F | 1.6" |
September | 45°F | 77°F | 60°F | 1.4" |
October | 33°F | 63°F | 47°F | 1.2" |
November | 24°F | 53°F | 38°F | 0.5" |
December | 15°F | 41°F | 27°F | 0.6" |
Index | Cheyenne | Wyoming | National |
Air quality index | 43 | 39 | 42 |
Pollution index | 396,188 | 1,779,975 | 2,726,193 |
Measurement | Total |
Days measured | 365 |
Days with good air quality | 305 |
Days with moderate air quality | 60 |
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 | 0.001% |
Lead | 0.002% |
Mercury | 0.000% |
City | Population | Air Quality Index | National Avg. |
Fox Farm-College, WY | 4,105 | 43 | 14.0% |
Ranchettes, WY | 6,384 | 43 | 14.0% |
South Greeley, WY | 4,473 | 43 | 14.0% |
Warren AFB, WY | 2,997 | 43 | 14.0% |
Cheyenne, WY | 64,099 | 43 | 14.0% |
City | Population | Air Quality Index | National Avg. |
South Hill, WA | 64,104 | 30 | 40.0% |
San Marcos, TX | 64,053 | 44 | 12.0% |
Youngstown, OH | 64,152 | 42 | 16.0% |
Lake Elsinore, CA | 64,201 | 89 | 78.0% |
Bellevue, NE | 63,970 | 40 | 20.0% |
Cheyenne, WY | 64,099 | 43 | 14.0% |