| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | 35°F | 55°F | 44°F | 3.3" |
| February | 37°F | 58°F | 47°F | 2.6" |
| March | 46°F | 68°F | 56°F | 6.7" |
| April | 53°F | 76°F | 64°F | 6.9" |
| May | 61°F | 81°F | 70°F | 7.1" |
| June | 70°F | 91°F | 80°F | 3.9" |
| July | 72°F | 94°F | 82°F | 5.6" |
| August | 71°F | 94°F | 81°F | 2.4" |
| September | 63°F | 87°F | 74°F | 2.5" |
| October | 52°F | 77°F | 63°F | 3.6" |
| November | 44°F | 66°F | 54°F | 6.2" |
| December | 37°F | 56°F | 45°F | 7.7" |
| Index | Mena | Arkansas | National |
| Air quality index | 35 | 38 | 50 |
| Pollution index | 6,037,890 | 1,270,108 | 5,066,862 |
| Measurement | Total |
| Days measured | 365 |
| Days with good air quality | 317 |
| Days with moderate air quality | 48 |
| Days w/ poor A.Q. for sensitive groups | |
| Days with unhealthy air quality |
| Pollutant | Total |
| Arsenic | 0.010% |
| Benzene | 0.030% |
| Carbon Tetrachloride | 3.210% |
| Lead | 0.160% |
| Mercury | 0.000% |
| City, State | Population | Air Quality Index | National Avg. |
| Cove, AR | 389 | 35 | 30% |
| Hatfield, AR | 396 | 35 | 30% |
| Vandervoort, AR | 89 | 38 | 24% |
| Mena, AR | 5,674 | 35 | 30% |
| City, State | Population | Air Quality Index | National Avg. |
| Bath, NY | 5,674 | 30 | 40% |
| Ocean Shores, WA | 5,673 | 21 | 58% |
| Pana, IL | 5,673 | 39 | 22% |
| Willow Springs, IL | 5,677 | 60 | 20% |
| Las Flores, CA | 5,671 | 85 | 70% |
| Mena, AR | 5,674 | 35 | 30% |