| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | 39°F | 63°F | 50°F | 5.3" |
| February | 42°F | 66°F | 53°F | 4.5" |
| March | 49°F | 74°F | 61°F | 5.1" |
| April | 56°F | 80°F | 67°F | 8.6" |
| May | 62°F | 86°F | 73°F | 8.0" |
| June | 69°F | 91°F | 80°F | 5.8" |
| July | 71°F | 92°F | 81°F | 3.9" |
| August | 71°F | 93°F | 81°F | 4.3" |
| September | 65°F | 89°F | 76°F | 8.2" |
| October | 53°F | 82°F | 66°F | 4.1" |
| November | 46°F | 72°F | 58°F | 3.6" |
| December | 43°F | 65°F | 53°F | 7.9" |
| Index | Mamou | Louisiana | National |
| Air quality index | 41 | 106 | 42 |
| Pollution index | 847,977 | 2,526,475 | 2,726,193 |
| Measurement | Total |
| Days measured | 365 |
| Days with good air quality | 280 |
| Days with moderate air quality | 85 |
| Days w/ poor A.Q. for sensitive groups | 0 |
| Days with unhealthy air quality | 0 |
| Pollutant | Total |
| Arsenic | 0.000% |
| Benzene | 0.010% |
| Carbon Tetrachloride | 0.002% |
| Lead | 0.000% |
| Mercury | 0.002% |
| City | Population | Air Quality Index | National Avg. |
| Oakdale, LA | 7,571 | 30 | 40.0% |
| Pine Prairie, LA | 1,589 | 30 | 40.0% |
| Chataignier, LA | 249 | 41 | 18.0% |
| Ville Platte, LA | 7,117 | 41 | 18.0% |
| Eunice, LA | 9,754 | 41 | 18.0% |
| Mamou, LA | 3,137 | 41 | 18.0% |
| City | Population | Air Quality Index | National Avg. |
| Knoxville, IL | 3,137 | 41 | 18.0% |
| Blanchard, LA | 3,137 | 39 | 22.0% |
| Elgin, OK | 3,137 | 43 | 14.0% |
| Milbank, SD | 3,137 | 25 | 50.0% |
| Zillah, WA | 3,137 | 38 | 24.0% |
| Mamou, LA | 3,137 | 41 | 18.0% |
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