| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | 32°F | 51°F | 40°F | 3.8" |
| February | 34°F | 53°F | 43°F | 3.2" |
| March | 44°F | 64°F | 53°F | 5.1" |
| April | 52°F | 74°F | 63°F | 5.2" |
| May | 61°F | 81°F | 70°F | 6.9" |
| June | 69°F | 90°F | 79°F | 2.9" |
| July | 71°F | 91°F | 80°F | 3.3" |
| August | 70°F | 91°F | 80°F | 2.1" |
| September | 63°F | 86°F | 73°F | 2.6" |
| October | 51°F | 75°F | 62°F | 3.5" |
| November | 41°F | 63°F | 51°F | 3.7" |
| December | 36°F | 53°F | 44°F | 5.7" |
| Index | Marianna | Arkansas | National |
| Air quality index | 44 | 38 | 50 |
| Pollution index | 855,910 | 1,270,108 | 5,066,862 |
| Measurement | Total |
| Days measured | 365 |
| Days with good air quality | 239 |
| Days with moderate air quality | 124 |
| Days w/ poor A.Q. for sensitive groups | 2 |
| Days with unhealthy air quality |
| Pollutant | Total |
| Arsenic | 0.001% |
| Benzene | 0.010% |
| Carbon Tetrachloride | 0.000% |
| Lead | 0.020% |
| Mercury | 0.140% |
| City, State | Population | Air Quality Index | National Avg. |
| Marvell, AR | 1,181 | 37 | 26% |
| LaGrange, AR | 51 | 44 | 12% |
| Palestine, AR | 751 | 44 | 12% |
| Lexa, AR | 375 | 44 | 12% |
| Rondo, AR | 299 | 44 | 12% |
| Marianna, AR | 3,840 | 44 | 12% |
| City, State | Population | Air Quality Index | National Avg. |
| Pixley, CA | 3,840 | 74 | 48% |
| Lambertville, NJ | 3,841 | 40 | 20% |
| South Russell, OH | 3,839 | 55 | 10% |
| Grand Bay, AL | 3,841 | 32 | 36% |
| Cresco, IA | 3,839 | 37 | 26% |
| Marianna, AR | 3,840 | 44 | 12% |
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