| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | 39°F | 63°F | 50°F | 5.2" |
| February | 42°F | 65°F | 52°F | 5.6" |
| March | 49°F | 74°F | 60°F | 5.5" |
| April | 56°F | 81°F | 67°F | 3.8" |
| May | 62°F | 86°F | 74°F | 4.2" |
| June | 70°F | 93°F | 80°F | 3.9" |
| July | 72°F | 94°F | 82°F | 4.1" |
| August | 72°F | 95°F | 82°F | 4.5" |
| September | 66°F | 91°F | 77°F | 3.2" |
| October | 54°F | 82°F | 66°F | 3.5" |
| November | 45°F | 72°F | 57°F | 4.5" |
| December | 41°F | 64°F | 51°F | 5.8" |
| Index | Hessmer | Louisiana | National |
| Air quality index | 30 | 106 | 42 |
| Pollution index | 860,756 | 2,526,475 | 2,726,193 |
| Measurement | Total |
| Days measured | 119 |
| Days with good air quality | 107 |
| Days with moderate air quality | 12 |
| Days w/ poor A.Q. for sensitive groups | 0 |
| Days with unhealthy air quality | 0 |
| Pollutant | Total |
| Arsenic | 0.001% |
| Benzene | 0.010% |
| Carbon Tetrachloride | 0.002% |
| Lead | 0.000% |
| Mercury | 0.000% |
| City | Population | Air Quality Index | National Avg. |
| Center Point, LA | 1,274 | 30 | 40.0% |
| Cottonport, LA | 1,792 | 30 | 40.0% |
| Moreauville, LA | 1,130 | 30 | 40.0% |
| Cheneyville, LA | 789 | 30 | 40.0% |
| Evergreen, LA | 282 | 30 | 40.0% |
| Hessmer, LA | 806 | 30 | 40.0% |
| City | Population | Air Quality Index | National Avg. |
| Offerman, GA | 806 | 36 | 28.0% |
| Shellsburg, IA | 806 | 39 | 22.0% |
| Ashkum, IL | 806 | 42 | 16.0% |
| Clyde, KS | 806 | 32 | 36.0% |
| Gibbon, MN | 806 | 32 | 36.0% |
| Hessmer, LA | 806 | 30 | 40.0% |
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