| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | 42°F | 65°F | 52°F | 7.3" |
| February | 45°F | 67°F | 54°F | 7.3" |
| March | 52°F | 74°F | 62°F | 7.7" |
| April | 58°F | 80°F | 68°F | 9.7" |
| May | 63°F | 84°F | 73°F | 10.8" |
| June | 71°F | 90°F | 80°F | 6.2" |
| July | 72°F | 90°F | 80°F | 5.8" |
| August | 72°F | 90°F | 80°F | 9.5" |
| September | 69°F | 89°F | 77°F | 8.0" |
| October | 58°F | 82°F | 69°F | 24.8" |
| November | 47°F | 71°F | 57°F | 9.5" |
| December | 46°F | 66°F | 54°F | 10.8" |
| Index | Rosedale | Louisiana | National |
| Air quality index | 45 | 106 | 42 |
| Pollution index | 394,287 | 2,526,475 | 2,726,193 |
| Measurement | Total |
| Days measured | 365 |
| Days with good air quality | 224 |
| Days with moderate air quality | 132 |
| Days w/ poor A.Q. for sensitive groups | 9 |
| Days with unhealthy air quality | 0 |
| Pollutant | Total |
| Arsenic | 0.000% |
| Benzene | 0.010% |
| Carbon Tetrachloride | 0.001% |
| Lead | 0.000% |
| Mercury | 0.000% |
| City | Population | Air Quality Index | National Avg. |
| Brusly, LA | 2,690 | 45 | 10.0% |
| Fordoche, LA | 953 | 45 | 10.0% |
| Plaquemine, LA | 6,589 | 45 | 10.0% |
| Erwinville, LA | 2,815 | 45 | 10.0% |
| Grosse Tete, LA | 514 | 45 | 10.0% |
| Rosedale, LA | 1,225 | 45 | 10.0% |
| City | Population | Air Quality Index | National Avg. |
| Watson, LA | 1,225 | 45 | 10.0% |
| Archie, MO | 1,225 | 47 | 6.0% |
| Chinook, MT | 1,225 | 21 | 58.0% |
| Saint-Armand, QC | 1,225 | n/a | |
| Pasatiempo, CA | 1,226 | 35 | 30.0% |
| Rosedale, LA | 1,225 | 45 | 10.0% |
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