| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | 34°F | 48°F | 40°F | 9.1" |
| February | 34°F | 51°F | 41°F | 3.8" |
| March | 43°F | 66°F | 54°F | 6.1" |
| April | 49°F | 70°F | 59°F | 9.6" |
| May | 59°F | 83°F | 70°F | 1.7" |
| June | 68°F | 91°F | 79°F | 6.4" |
| July | 71°F | 90°F | 79°F | 8.1" |
| August | 74°F | 96°F | 84°F | 8.8" |
| September | 65°F | 87°F | 75°F | 4.9" |
| October | 52°F | 75°F | 62°F | 11.5" |
| November | 42°F | 63°F | 52°F | 6.2" |
| December | 32°F | 50°F | 40°F | 6.0" |
| Index | Marmaduke | Arkansas | National |
| Air quality index | 26 | 38 | 42 |
| Pollution index | 933,847 | 1,487,822 | 2,726,193 |
| Measurement | Total |
| Days measured | 360 |
| Days with good air quality | 341 |
| Days with moderate air quality | 19 |
| Days w/ poor A.Q. for sensitive groups | 0 |
| Days with unhealthy air quality | 0 |
| Pollutant | Total |
| Arsenic | 0.002% |
| Benzene | 0.040% |
| Carbon Tetrachloride | 0.002% |
| Lead | 0.003% |
| Mercury | 0.000% |
| City | Population | Air Quality Index | National Avg. |
| Knobel, AR | 245 | 26 | 48.0% |
| Senath, MO | 1,721 | 26 | 48.0% |
| Arbyrd, MO | 417 | 26 | 48.0% |
| Lafe, AR | 429 | 26 | 48.0% |
| Greenway, AR | 172 | 26 | 48.0% |
| Marmaduke, AR | 1,377 | 26 | 48.0% |
| City | Population | Air Quality Index | National Avg. |
| St. John, KS | 1,377 | 15 | 70.0% |
| Jonesville, LA | 1,377 | 30 | 40.0% |
| Bourne, MA | 1,377 | 36 | 28.0% |
| Beggs, OK | 1,377 | 45 | 10.0% |
| Factoryville, PA | 1,377 | 38 | 24.0% |
| Marmaduke, AR | 1,377 | 26 | 48.0% |
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