| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | 29°F | 47°F | 37°F | 6.5" |
| February | 35°F | 55°F | 43°F | 3.2" |
| March | 45°F | 67°F | 55°F | 8.3" |
| April | 50°F | 70°F | 58°F | 3.9" |
| May | 61°F | 78°F | 68°F | 10.4" |
| June | 68°F | 86°F | 76°F | 15.7" |
| July | 70°F | 89°F | 79°F | 13.1" |
| August | 72°F | 92°F | 81°F | 12.2" |
| September | 67°F | 86°F | 75°F | 8.9" |
| October | 54°F | 76°F | 63°F | 6.0" |
| November | 43°F | 67°F | 53°F | 2.1" |
| December | 30°F | 50°F | 39°F | 3.9" |
| Index | Norman | Oklahoma | National |
| Air quality index | 48 | 55 | 42 |
| Pollution index | 791,228 | 1,271,533 | 2,726,193 |
| Measurement | Total |
| Days measured | 365 |
| Days with good air quality | 204 |
| Days with moderate air quality | 159 |
| Days w/ poor A.Q. for sensitive groups | 2 |
| 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. |
| Lexington, OK | 2,244 | 36 | 28.0% |
| Dibble, OK | 898 | 48 | 4.0% |
| Newcastle, OK | 10,425 | 48 | 4.0% |
| Goldsby, OK | 2,360 | 48 | 4.0% |
| Blanchard, OK | 8,362 | 48 | 4.0% |
| Norman, OK | 124,086 | 48 | 4.0% |
| City | Population | Air Quality Index | National Avg. |
| Lehigh Acres, FL | 124,523 | 36 | 28.0% |
| Fargo, ND | 123,550 | 33 | 34.0% |
| Abilene, TX | 124,691 | 33 | 34.0% |
| Athens, GA | 124,962 | 44 | 12.0% |
| Berkeley, CA | 123,065 | 40 | 20.0% |
| Norman, OK | 124,086 | 48 | 4.0% |
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