| 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 | Harrah | Oklahoma | National |
| Air quality index | 36 | 55 | 42 |
| Pollution index | 715,482 | 1,271,533 | 2,726,193 |
| Measurement | Total |
| Days measured | 231 |
| Days with good air quality | 216 |
| Days with moderate air quality | 14 |
| Days w/ poor A.Q. for sensitive groups | 1 |
| Days with unhealthy air quality |
| 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. |
| Warwick, OK | 184 | 36 | 28.0% |
| Wellston, OK | 858 | 36 | 28.0% |
| Bethel Acres, OK | 3,187 | 36 | 28.0% |
| McLoud, OK | 3,988 | 36 | 28.0% |
| Shawnee, OK | 31,361 | 36 | 28.0% |
| Harrah, OK | 6,480 | 36 | 28.0% |
| City | Population | Air Quality Index | National Avg. |
| Pollock Pines, CA | 6,480 | 44 | 12.0% |
| Cold Spring, KY | 6,481 | 54 | 8.0% |
| Buena Vista, VA | 6,477 | 26 | 48.0% |
| Edgemoor, DE | 6,483 | 51 | 2.0% |
| Orchard Mesa, CO | 6,484 | 44 | 12.0% |
| Harrah, OK | 6,480 | 36 | 28.0% |
Here are the best places to live in Oklahoma
Top 10 best public schools in Harrah
Check out the 10 safest cities in Oklahoma
10 Best cities in Oklahoma for employment