Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
January | 12°F | 31°F | 22°F | 0.3" |
February | 17°F | 36°F | 25°F | 0.3" |
March | 24°F | 47°F | 34°F | 0.5" |
April | 29°F | 55°F | 41°F | 0.9" |
May | 37°F | 65°F | 50°F | 1.4" |
June | 47°F | 79°F | 62°F | 0.5" |
July | 55°F | 87°F | 71°F | 0.7" |
August | 52°F | 83°F | 67°F | 0.7" |
September | 44°F | 74°F | 58°F | 0.8" |
October | 33°F | 59°F | 45°F | 0.7" |
November | 23°F | 45°F | 33°F | 0.3" |
December | 13°F | 31°F | 22°F | 0.2" |
Index | Rock Springs | Wyoming | National |
Air quality index | 46 | 39 | 42 |
Pollution index | 5,619,220 | 1,779,975 | 2,726,193 |
Measurement | Total |
Days measured | 365 |
Days with good air quality | 262 |
Days with moderate air quality | 100 |
Days w/ poor A.Q. for sensitive groups | 3 |
Days with unhealthy air quality | 0 |
Pollutant | Total |
Arsenic | 0.460% |
Benzene | 0.070% |
Carbon Tetrachloride | 0.002% |
Lead | 0.120% |
Mercury | 0.270% |
City | Population | Air Quality Index | National Avg. |
Superior, WY | 153 | 46 | 8.0% |
Purple Sage, WY | 764 | 46 | 8.0% |
Arrowhead Springs, WY | 121 | 46 | 8.0% |
North Rock Springs, WY | 2,727 | 46 | 8.0% |
Clearview Acres, WY | 994 | 46 | 8.0% |
Rock Springs, WY | 23,238 | 46 | 8.0% |
City | Population | Air Quality Index | National Avg. |
Roseburg, OR | 23,237 | 24 | 52.0% |
Cottage Lake, WA | 23,239 | 45 | 10.0% |
Avon, OH | 23,233 | 50 | = 100 |
Greenbelt, MD | 23,253 | 47 | 6.0% |
East Hants, NS | 23,212 | n/a | |
Rock Springs, WY | 23,238 | 46 | 8.0% |