| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | 31°F | 54°F | 41°F | 2.2" |
| February | 35°F | 57°F | 45°F | 2.0" |
| March | 45°F | 68°F | 55°F | 3.6" |
| April | 52°F | 76°F | 63°F | 5.6" |
| May | 60°F | 81°F | 69°F | 7.1" |
| June | 70°F | 90°F | 79°F | 4.7" |
| July | 72°F | 94°F | 82°F | 4.6" |
| August | 72°F | 94°F | 82°F | 3.6" |
| September | 64°F | 88°F | 74°F | 3.1" |
| October | 52°F | 77°F | 63°F | 4.1" |
| November | 43°F | 66°F | 53°F | 2.7" |
| December | 33°F | 55°F | 43°F | 2.8" |
| Index | Horntown | Oklahoma | National |
| Air quality index | 43 | 55 | 42 |
| Pollution index | 246,474 | 1,271,533 | 2,726,193 |
| Measurement | Total |
| Days measured | 365 |
| Days with good air quality | 272 |
| Days with moderate air quality | 91 |
| Days w/ poor A.Q. for sensitive groups | 2 |
| Days with unhealthy air quality | 0 |
| Pollutant | Total |
| Arsenic | 0.000% |
| Benzene | 0.003% |
| Carbon Tetrachloride | 0.001% |
| Lead | 0.001% |
| Mercury | 0.000% |
| City | Population | Air Quality Index | National Avg. |
| Wewoka, OK | 3,271 | 36 | 28.0% |
| Holdenville, OK | 5,662 | 36 | 28.0% |
| Spaulding, OK | 100 | 36 | 28.0% |
| Stuart, OK | 152 | 43 | 14.0% |
| Wetumka, OK | 1,264 | 43 | 14.0% |
| Horntown, OK | 136 | 43 | 14.0% |
| City | Population | Air Quality Index | National Avg. |
| Minto, AK | 136 | 38 | 24.0% |
| Springtown, AR | 136 | 44 | 12.0% |
| Mount Carmel, FL | 136 | 41 | 18.0% |
| Huey, IL | 136 | 43 | 14.0% |
| Radom, IL | 136 | 43 | 14.0% |
| Horntown, OK | 136 | 43 | 14.0% |
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