| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | 27°F | 50°F | 37°F | 3.1" |
| February | 29°F | 52°F | 40°F | 2.6" |
| March | 38°F | 63°F | 50°F | 5.5" |
| April | 47°F | 71°F | 58°F | 7.3" |
| May | 55°F | 77°F | 65°F | 7.4" |
| June | 64°F | 86°F | 75°F | 4.2" |
| July | 67°F | 90°F | 78°F | 5.1" |
| August | 66°F | 90°F | 77°F | 4.7" |
| September | 58°F | 82°F | 69°F | 5.0" |
| October | 46°F | 72°F | 58°F | 5.2" |
| November | 37°F | 62°F | 49°F | 3.5" |
| December | 29°F | 51°F | 39°F | 3.8" |
| Index | Farmington | Arkansas | National |
| Air quality index | 44 | 38 | 42 |
| Pollution index | 182,136 | 1,487,822 | 2,726,193 |
| Measurement | Total |
| Days measured | 365 |
| Days with good air quality | 267 |
| Days with moderate air quality | 98 |
| 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 | 0.000% |
| Lead | 0.000% |
| Mercury | 0.000% |
| City | Population | Air Quality Index | National Avg. |
| Elkins, AR | 3,283 | 44 | 12.0% |
| Greenland, AR | 1,558 | 44 | 12.0% |
| Springdale, AR | 80,433 | 44 | 12.0% |
| Elm Springs, AR | 2,442 | 44 | 12.0% |
| Johnson, AR | 3,719 | 44 | 12.0% |
| Farmington, AR | 7,166 | 44 | 12.0% |
| City | Population | Air Quality Index | National Avg. |
| Dunbar, WV | 7,166 | 40 | 20.0% |
| North Vernon, IN | 7,167 | 35 | 30.0% |
| Independence, OH | 7,167 | 50 | = 100 |
| Mims, FL | 7,164 | 37 | 26.0% |
| Willow Oak, FL | 7,168 | 36 | 28.0% |
| Farmington, AR | 7,166 | 44 | 12.0% |
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