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| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | 44°F | 64°F | 54°F | 4.1" |
| February | 48°F | 67°F | 57°F | 3.7" |
| March | 54°F | 73°F | 64°F | 3.8" |
| April | 60°F | 79°F | 70°F | 5.1" |
| May | 67°F | 84°F | 76°F | 6.4" |
| June | 73°F | 90°F | 81°F | 5.9" |
| July | 74°F | 90°F | 82°F | 5.9" |
| August | 75°F | 91°F | 82°F | 7.1" |
| September | 71°F | 88°F | 79°F | 3.9" |
| October | 61°F | 81°F | 70°F | 3.8" |
| November | 51°F | 73°F | 61°F | 2.6" |
| December | 47°F | 67°F | 56°F | 7.6" |
| Index | Marrero | Louisiana | National |
| Air quality index | 45 | 106 | 42 |
| Pollution index | 3,881,730 | 2,526,475 | 2,726,193 |
| Measurement | Total |
| Days measured | 365 |
| Days with good air quality | 229 |
| Days with moderate air quality | 134 |
| Days w/ poor A.Q. for sensitive groups | 2 |
| Days with unhealthy air quality | 0 |
| Pollutant | Total |
| Arsenic | 0.000% |
| Benzene | 0.040% |
| Carbon Tetrachloride | 0.002% |
| Lead | 0.010% |
| Mercury | 0.000% |
| City | Population | Air Quality Index | National Avg. |
| Ama, LA | 1,052 | 45 | 10.0% |
| Elmwood, LA | 6,099 | 45 | 10.0% |
| Jefferson, LA | 10,286 | 45 | 10.0% |
| Waggaman, LA | 10,917 | 45 | 10.0% |
| Gretna, LA | 17,746 | 45 | 10.0% |
| Marrero, LA | 31,751 | 45 | 10.0% |
| City | Population | Air Quality Index | National Avg. |
| Savage, MN | 31,758 | 46 | 8.0% |
| Liberty, MO | 31,761 | 47 | 6.0% |
| Garfield, NJ | 31,722 | 51 | 2.0% |
| Southlake, TX | 31,684 | 51 | 2.0% |
| Bay Shore, NY | 31,819 | 43 | 14.0% |
| Marrero, LA | 31,751 | 45 | 10.0% |
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