| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | 34°F | 56°F | 44°F | 2.5" |
| February | 38°F | 60°F | 47°F | 2.1" |
| March | 47°F | 69°F | 56°F | 2.9" |
| April | 54°F | 76°F | 64°F | 4.7" |
| May | 61°F | 82°F | 71°F | 5.6" |
| June | 71°F | 91°F | 81°F | 4.5" |
| July | 74°F | 95°F | 84°F | 3.1" |
| August | 74°F | 96°F | 84°F | 3.1" |
| September | 67°F | 89°F | 77°F | 2.9" |
| October | 56°F | 79°F | 66°F | 3.1" |
| November | 46°F | 67°F | 56°F | 2.9" |
| December | 37°F | 56°F | 45°F | 2.6" |
| Index | Lebanon | 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. |
| Marietta CDP, OK | 149 | 43 | 14.0% |
| Madill, OK | 3,978 | 43 | 14.0% |
| Marietta, OK | 2,746 | 43 | 14.0% |
| Mannsville, OK | 1,013 | 43 | 14.0% |
| Thackerville, OK | 400 | 43 | 14.0% |
| Lebanon, OK | 253 | 43 | 14.0% |
| City | Population | Air Quality Index | National Avg. |
| McIntosh, AL | 253 | 42 | 16.0% |
| Lava Hot Springs, ID | 253 | 27 | 46.0% |
| Spring Lake, IN | 253 | 54 | 8.0% |
| Westport, KY | 253 | 49 | 2.0% |
| Jennings, MI | 253 | 36 | 28.0% |
| Lebanon, OK | 253 | 43 | 14.0% |
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