| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | 36°F | 59°F | 46°F | 8.0" |
| February | 40°F | 63°F | 49°F | 7.3" |
| March | 49°F | 72°F | 59°F | 13.8" |
| April | 56°F | 80°F | 67°F | 7.9" |
| May | 62°F | 84°F | 72°F | 12.8" |
| June | 72°F | 93°F | 82°F | 9.0" |
| July | 74°F | 95°F | 83°F | 5.9" |
| August | 74°F | 97°F | 84°F | 3.4" |
| September | 67°F | 91°F | 78°F | 20.6" |
| October | 56°F | 81°F | 67°F | 15.8" |
| November | 46°F | 68°F | 55°F | 8.6" |
| December | 41°F | 61°F | 50°F | 10.2" |
| Index | Sarepta | Louisiana | National |
| Air quality index | 39 | 106 | 42 |
| Pollution index | 1,213,780 | 2,526,475 | 2,726,193 |
| Measurement | Total |
| Days measured | 365 |
| Days with good air quality | 291 |
| Days with moderate air quality | 74 |
| Days w/ poor A.Q. for sensitive groups | 0 |
| Days with unhealthy air quality | 0 |
| Pollutant | Total |
| Arsenic | 0.001% |
| Benzene | 0.020% |
| Carbon Tetrachloride | 0.002% |
| Lead | 0.005% |
| Mercury | 0.000% |
| City | Population | Air Quality Index | National Avg. |
| Shongaloo, LA | 141 | 35 | 30.0% |
| Emerson, AR | 195 | 35 | 30.0% |
| Taylor, AR | 875 | 39 | 22.0% |
| Cotton Valley, LA | 962 | 39 | 22.0% |
| Plain Dealing, LA | 1,003 | 39 | 22.0% |
| Sarepta, LA | 912 | 39 | 22.0% |
| City | Population | Air Quality Index | National Avg. |
| Altus, AR | 912 | 36 | 28.0% |
| Spiceland, IN | 912 | 28 | 44.0% |
| Highfield-Cascade, MD | 912 | 40 | 20.0% |
| Heidelberg, MS | 912 | 36 | 28.0% |
| Stonewall, MS | 912 | 36 | 28.0% |
| Sarepta, LA | 912 | 39 | 22.0% |
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