| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | 28°F | 53°F | 39°F | 0.7" |
| February | 32°F | 56°F | 42°F | 1.2" |
| March | 44°F | 68°F | 54°F | 2.1" |
| April | 51°F | 75°F | 61°F | 3.7" |
| May | 59°F | 81°F | 69°F | 5.2" |
| June | 70°F | 91°F | 80°F | 5.0" |
| July | 73°F | 95°F | 84°F | 3.9" |
| August | 72°F | 94°F | 83°F | 3.4" |
| September | 64°F | 86°F | 74°F | 2.8" |
| October | 52°F | 76°F | 63°F | 2.9" |
| November | 41°F | 64°F | 51°F | 1.5" |
| December | 31°F | 52°F | 40°F | 0.9" |
| Index | Nichols Hills | Oklahoma | National |
| Air quality index | 48 | 55 | 42 |
| Pollution index | 715,482 | 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 | 0.100% |
| Benzene | 0.010% |
| Carbon Tetrachloride | 0.001% |
| Lead | 0.030% |
| Mercury | 0.070% |
| City | Population | Air Quality Index | National Avg. |
| Moore, OK | 61,683 | 48 | 4.0% |
| Lake Aluma, OK | 60 | 48 | 4.0% |
| Bethany, OK | 19,292 | 48 | 4.0% |
| Mustang, OK | 22,228 | 48 | 4.0% |
| Spencer, OK | 3,985 | 48 | 4.0% |
| Nichols Hills, OK | 3,910 | 48 | 4.0% |
| City | Population | Air Quality Index | National Avg. |
| Grayson, KY | 3,910 | 42 | 16.0% |
| Washington Park, IL | 3,909 | 54 | 8.0% |
| Freeburg, IL | 3,911 | 54 | 8.0% |
| Baden, PA | 3,911 | 6 | 88.0% |
| Romeo, MI | 3,908 | 56 | 12.0% |
| Nichols Hills, OK | 3,910 | 48 | 4.0% |
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