| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | 33°F | 56°F | 43°F | 1.9" |
| February | 36°F | 60°F | 46°F | 1.8" |
| March | 46°F | 69°F | 56°F | 2.7" |
| April | 53°F | 76°F | 63°F | 3.4" |
| May | 61°F | 82°F | 71°F | 6.0" |
| June | 70°F | 91°F | 80°F | 3.8" |
| July | 73°F | 95°F | 83°F | 2.9" |
| August | 73°F | 96°F | 84°F | 2.2" |
| September | 65°F | 88°F | 76°F | 1.7" |
| October | 54°F | 78°F | 65°F | 2.2" |
| November | 44°F | 67°F | 54°F | 2.1" |
| December | 35°F | 56°F | 44°F | 2.2" |
| Index | Leon | Oklahoma | National |
| Air quality index | 43 | 55 | 42 |
| Pollution index | 449,976 | 1,271,533 | 2,726,193 |
| Measurement | Total |
| Days measured | 365 |
| Days with good air quality | 285 |
| Days with moderate air quality | 80 |
| Days w/ poor A.Q. for sensitive groups | 0 |
| Days with unhealthy air quality | 0 |
| Pollutant | Total |
| Arsenic | 0.000% |
| Benzene | 0.010% |
| Carbon Tetrachloride | 0.001% |
| Lead | 0.000% |
| Mercury | 0.000% |
| City | Population | Air Quality Index | National Avg. |
| Burneyville, OK | 743 | 43 | 14.0% |
| Nocona Hills, TX | 640 | 43 | 14.0% |
| St. Jo, TX | 863 | 43 | 14.0% |
| Leon, OK | 92 | 43 | 14.0% |
| City | Population | Air Quality Index | National Avg. |
| Rock House, AZ | 92 | 44 | 12.0% |
| Big Lagoon, CA | 92 | 27 | 46.0% |
| Ricketts, IA | 92 | 35 | 30.0% |
| Bishop Hill, IL | 92 | 46 | 8.0% |
| Mount Auburn, IN | 92 | 28 | 44.0% |
| Leon, OK | 92 | 43 | 14.0% |
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