| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | 45°F | 64°F | 55°F | 7.9" |
| February | 48°F | 67°F | 57°F | 5.9" |
| March | 54°F | 73°F | 64°F | 8.1" |
| April | 61°F | 79°F | 71°F | 8.8" |
| May | 67°F | 84°F | 77°F | 9.4" |
| June | 73°F | 90°F | 82°F | 13.1" |
| July | 75°F | 90°F | 82°F | 5.2" |
| August | 75°F | 91°F | 82°F | 5.9" |
| September | 71°F | 88°F | 79°F | 2.9" |
| October | 61°F | 81°F | 71°F | 3.2" |
| November | 52°F | 73°F | 62°F | 1.8" |
| December | 49°F | 67°F | 57°F | 5.7" |
| Index | Thibodaux | Louisiana | National |
| Air quality index | 41 | 106 | 42 |
| Pollution index | 2,337,990 | 2,526,475 | 2,726,193 |
| Measurement | Total |
| Days measured | 361 |
| Days with good air quality | 272 |
| Days with moderate air quality | 87 |
| Days w/ poor A.Q. for sensitive groups | 2 |
| Days with unhealthy air quality | 0 |
| Pollutant | Total |
| Arsenic | 0.010% |
| Benzene | 0.030% |
| Carbon Tetrachloride | 0.004% |
| Lead | 0.002% |
| Mercury | 0.000% |
| City | Population | Air Quality Index | National Avg. |
| Gray, LA | 6,366 | 41 | 18.0% |
| Bayou L'Ourse, LA | 2,231 | 41 | 18.0% |
| Supreme, LA | 494 | 41 | 18.0% |
| Kraemer, LA | 1,041 | 41 | 18.0% |
| Houma, LA | 33,053 | 41 | 18.0% |
| Thibodaux, LA | 14,565 | 41 | 18.0% |
| City | Population | Air Quality Index | National Avg. |
| Homosassa Springs, FL | 14,566 | 30 | 40.0% |
| Roanoke Rapids, NC | 14,562 | 36 | 28.0% |
| Saraland, AL | 14,561 | 42 | 16.0% |
| Pewaukee, WI | 14,561 | 44 | 12.0% |
| Gantt, SC | 14,556 | 46 | 8.0% |
| Thibodaux, LA | 14,565 | 41 | 18.0% |
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