| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | 6°F | 77°F | 40°F | 1.0" |
| February | 8°F | 82°F | 44°F | 1.4" |
| March | 15°F | 92°F | 54°F | 3.4" |
| April | 28°F | 98°F | 61°F | 3.1" |
| May | 40°F | 99°F | 70°F | 4.5" |
| June | 55°F | 102°F | 79°F | 4.9" |
| July | 58°F | 108°F | 82°F | 2.8" |
| August | 60°F | 107°F | 82°F | 6.0" |
| September | 45°F | 97°F | 73°F | 3.3" |
| October | 31°F | 92°F | 61°F | 2.9" |
| November | 21°F | 86°F | 52°F | 0.7" |
| December | 6°F | 76°F | 39°F | 1.9" |
| Index | Oklahoma City | Oklahoma | National |
| Air quality index | 47 | 55 | 50 |
| Pollution index | 715,482 | 1,278,581 | 5,066,862 |
| Measurement | Total |
| Days measured | 365 |
| Days with good air quality | 222 |
| Days with moderate air quality | 140 |
| Days w/ poor A.Q. for sensitive groups | 3 |
| Days with unhealthy air quality |
| Pollutant | Total |
| Arsenic | 0.100% |
| Benzene | 0.010% |
| Carbon Tetrachloride | 0.001% |
| Lead | 0.030% |
| Mercury | 0.070% |
| City, State | Population | Air Quality Index | National Avg. |
| Bethany, OK | 19,582 | 47 | 6% |
| Forest Park, OK | 1,079 | 47 | 6% |
| Moore, OK | 59,501 | 47 | 6% |
| Piedmont, OK | 6,779 | 47 | 6% |
| Valley Brook, OK | 804 | 47 | 6% |
| Oklahoma City, OK | 620,015 | 47 | 6% |
| City, State | Population | Air Quality Index | National Avg. |
| Portland, OR | 620,589 | 38 | 24% |
| Baltimore, MD | 621,000 | 46 | 8% |
| Las Vegas, NV | 613,295 | 54 | 8% |
| Louisville, KY | 611,573 | 55 | 10% |
| Milwaukee, WI | 598,672 | 45 | 10% |
| Oklahoma City, OK | 620,015 | 47 | 6% |