| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | 31°F | 50°F | 39°F | 4.0" |
| February | 34°F | 53°F | 42°F | 3.7" |
| March | 43°F | 64°F | 53°F | 7.7" |
| April | 52°F | 74°F | 62°F | 7.3" |
| May | 60°F | 80°F | 69°F | 7.6" |
| June | 68°F | 89°F | 78°F | 6.7" |
| July | 71°F | 92°F | 80°F | 5.6" |
| August | 70°F | 91°F | 79°F | 6.5" |
| September | 62°F | 84°F | 72°F | 5.1" |
| October | 51°F | 74°F | 61°F | 4.8" |
| November | 42°F | 62°F | 51°F | 5.3" |
| December | 34°F | 52°F | 42°F | 6.9" |
| Index | Southside | Arkansas | National |
| Air quality index | 45 | 38 | 42 |
| Pollution index | 234,372 | 1,487,822 | 2,726,193 |
| Measurement | Total |
| Days measured | 365 |
| Days with good air quality | 235 |
| Days with moderate air quality | 130 |
| Days w/ poor A.Q. for sensitive groups | 0 |
| Days with unhealthy air quality | 0 |
| Pollutant | Total |
| Arsenic | 0.001% |
| Benzene | 0.003% |
| Carbon Tetrachloride | 0.000% |
| Lead | 0.020% |
| Mercury | 0.000% |
| City | Population | Air Quality Index | National Avg. |
| Cushman, AR | 428 | 36 | 28.0% |
| Concord, AR | 171 | 45 | 10.0% |
| Pleasant Plains, AR | 199 | 45 | 10.0% |
| Newark, AR | 1,290 | 45 | 10.0% |
| Sulphur Rock, AR | 582 | 45 | 10.0% |
| Southside, AR | 3,963 | 45 | 10.0% |
| City | Population | Air Quality Index | National Avg. |
| Gentry, AR | 3,963 | 44 | 12.0% |
| Mahanoy City, PA | 3,963 | 42 | 16.0% |
| Metter, GA | 3,962 | 39 | 22.0% |
| Bealeton, VA | 3,964 | 38 | 24.0% |
| Hephzibah, GA | 3,961 | 47 | 6.0% |
| Southside, AR | 3,963 | 45 | 10.0% |
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