| 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 | Marksville | 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. |
| Fifth Ward, LA | 1,069 | 30 | 40.0% |
| Hessmer, LA | 806 | 30 | 40.0% |
| Simmesport, LA | 1,395 | 30 | 40.0% |
| Bunkie, LA | 3,903 | 30 | 40.0% |
| Bordelonville, LA | 490 | 30 | 40.0% |
| Marksville, LA | 5,376 | 30 | 40.0% |
| City | Population | Air Quality Index | National Avg. |
| Evansville, WI | 5,374 | 38 | 24.0% |
| Chelsea, MI | 5,378 | 40 | 20.0% |
| James City, NC | 5,378 | 37 | 26.0% |
| Sainte-Anne-de-Bellevue, QC | 5,373 | n/a | |
| Tice, FL | 5,379 | 36 | 28.0% |
| Marksville, LA | 5,376 | 30 | 40.0% |
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