Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
January | 13°F | 31°F | 21°F | 0.4" |
February | 16°F | 33°F | 24°F | 0.4" |
March | 23°F | 43°F | 32°F | 0.5" |
April | 28°F | 52°F | 39°F | 0.9" |
May | 36°F | 62°F | 48°F | 1.9" |
June | 45°F | 75°F | 60°F | 0.8" |
July | 53°F | 84°F | 68°F | 0.5" |
August | 51°F | 82°F | 66°F | 0.9" |
September | 43°F | 72°F | 56°F | 1.3" |
October | 33°F | 58°F | 44°F | 0.9" |
November | 23°F | 45°F | 33°F | 0.5" |
December | 14°F | 31°F | 22°F | 0.4" |
Index | Opal | Wyoming | National |
Air quality index | 44 | 39 | 42 |
Pollution index | 641,359 | 1,779,975 | 2,726,193 |
Measurement | Total |
Days measured | 365 |
Days with good air quality | 315 |
Days with moderate air quality | 49 |
Days w/ poor A.Q. for sensitive groups | 1 |
Days with unhealthy air quality | 0 |
Pollutant | Total |
Arsenic | 0.000% |
Benzene | 0.010% |
Carbon Tetrachloride | 0.001% |
Lead | 0.001% |
Mercury | 0.000% |
City | Population | Air Quality Index | National Avg. |
Diamondville, WY | 745 | 44 | 12.0% |
Kemmerer, WY | 2,758 | 44 | 12.0% |
Oakley, WY | 0 | 44 | 12.0% |
Opal, WY | 87 | 44 | 12.0% |
City | Population | Air Quality Index | National Avg. |
Mooresville, AL | 87 | 41 | 18.0% |
Ozan, AR | 87 | 39 | 22.0% |
Cokedale, CO | 87 | 15 | 70.0% |
West Chester, IA | 87 | 35 | 30.0% |
Wiota, IA | 87 | 40 | 20.0% |
Opal, WY | 87 | 44 | 12.0% |