| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | 32°F | 51°F | 40°F | 9.7" |
| February | 34°F | 55°F | 44°F | 4.4" |
| March | 45°F | 68°F | 55°F | 4.0" |
| April | 48°F | 71°F | 59°F | 4.1" |
| May | 59°F | 80°F | 69°F | 6.3" |
| June | 67°F | 87°F | 76°F | 8.0" |
| July | 69°F | 91°F | 79°F | 11.2" |
| August | 72°F | 93°F | 82°F | 11.4" |
| September | 65°F | 88°F | 75°F | 8.2" |
| October | 53°F | 77°F | 63°F | 4.6" |
| November | 41°F | 66°F | 53°F | 2.0" |
| December | 28°F | 52°F | 39°F | 3.3" |
| Index | Duchess Landing | Oklahoma | National |
| Air quality index | 5 | 55 | 42 |
| Pollution index | 1,454,170 | 1,271,533 | 2,726,193 |
| Measurement | Total |
| Days measured | 286 |
| Days with good air quality | 269 |
| Days with moderate air quality | 15 |
| Days w/ poor A.Q. for sensitive groups | 1 |
| Days with unhealthy air quality | 1 |
| Pollutant | Total |
| Arsenic | 0.000% |
| Benzene | 0.020% |
| Carbon Tetrachloride | 0.001% |
| Lead | 0.000% |
| Mercury | 0.000% |
| City | Population | Air Quality Index | National Avg. |
| Rentiesville, OK | 155 | 5 | 90.0% |
| Webbers Falls, OK | 520 | 5 | 90.0% |
| Checotah, OK | 3,113 | 5 | 90.0% |
| Wainwright, OK | 136 | 5 | 90.0% |
| Simms, OK | 359 | 5 | 90.0% |
| Duchess Landing, OK | 48 | 5 | 90.0% |
| City | Population | Air Quality Index | National Avg. |
| Chenega, AK | 48 | 31 | 38.0% |
| Morrison Bluff, AR | 48 | 36 | 28.0% |
| Johannesburg, CA | 48 | 67 | 34.0% |
| Robinson Mill, CA | 48 | 44 | 12.0% |
| Cobbtown, FL | 48 | 41 | 18.0% |
| Duchess Landing, OK | 48 | 5 | 90.0% |
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