Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
January | 33°F | 52°F | 42°F | 5.9" |
February | 37°F | 55°F | 47°F | 2.2" |
March | 49°F | 68°F | 59°F | 14.4" |
April | 52°F | 71°F | 63°F | 4.9" |
May | 63°F | 79°F | 72°F | 11.9" |
June | 70°F | 88°F | 80°F | 13.6" |
July | 73°F | 91°F | 83°F | 7.2" |
August | 74°F | 94°F | 86°F | 18.1" |
September | 67°F | 87°F | 79°F | 5.9" |
October | 54°F | 76°F | 66°F | 4.9" |
November | 43°F | 68°F | 55°F | 1.6" |
December | 31°F | 52°F | 41°F | 4.4" |
Index | Duncan | Oklahoma | National |
Air quality index | 43 | 55 | 42 |
Pollution index | 906,693 | 1,271,533 | 2,726,193 |
Measurement | Total |
Days measured | 365 |
Days with good air quality | 285 |
Days with moderate air quality | 80 |
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 | 0.002% |
Lead | 0.000% |
Mercury | 0.000% |
City | Population | Air Quality Index | National Avg. |
Bray, OK | 1,053 | 43 | 14.0% |
Empire City, OK | 830 | 43 | 14.0% |
Central High, OK | 1,507 | 43 | 14.0% |
Meridian town, OK | 36 | 43 | 14.0% |
Marlow, OK | 4,455 | 43 | 14.0% |
Duncan, OK | 22,529 | 43 | 14.0% |
City | Population | Air Quality Index | National Avg. |
South Lake Tahoe, CA | 22,535 | 13 | 74.0% |
Hopewell, VA | 22,500 | 44 | 12.0% |
Greenfield, IN | 22,561 | 54 | 8.0% |
Silver Firs, WA | 22,564 | 45 | 10.0% |
Dolton, IL | 22,487 | 55 | 10.0% |
Duncan, OK | 22,529 | 43 | 14.0% |