| 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. |
| Jones, OK | 3,201 | 48 | 4.0% |
| Warr Acres, OK | 10,425 | 48 | 4.0% |
| Midwest City, OK | 58,587 | 48 | 4.0% |
| Smith Village, OK | 75 | 48 | 4.0% |
| Yukon, OK | 28,599 | 48 | 4.0% |
| Nichols Hills, OK | 4,066 | 48 | 4.0% |
| City | Population | Air Quality Index | National Avg. |
| Williamston, MI | 4,067 | 36 | 28.0% |
| Crabtree, QC | 4,064 | n/a | |
| Baie-D'Urfé, QC | 4,068 | n/a | |
| Montague, ON | 4,063 | n/a | |
| Rossville, GA | 4,069 | 46 | 8.0% |
| Nichols Hills, OK | 4,066 | 48 | 4.0% |