| 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 | 44 | 106 | 50 |
| Pollution index | 847,977 | 2,540,283 | 5,066,862 |
| Measurement | Total |
| Days measured | 365 |
| Days with good air quality | 230 |
| Days with moderate air quality | 134 |
| Days w/ poor A.Q. for sensitive groups | 1 |
| Days with unhealthy air quality |
| Pollutant | Total |
| Arsenic | 0.000% |
| Benzene | 0.010% |
| Carbon Tetrachloride | 0.002% |
| Lead | 0.000% |
| Mercury | 0.002% |
| City, State | Population | Air Quality Index | National Avg. |
| Chataignier, LA | 279 | 44 | 12% |
| Reddell, LA | 781 | 44 | 12% |
| Eunice, LA | 10,199 | 44 | 12% |
| Ville Platte, LA | 7,338 | 44 | 12% |
| Lawtell, LA | 1,352 | 44 | 12% |
| Mamou, LA | 3,203 | 44 | 12% |
| City, State | Population | Air Quality Index | National Avg. |
| Dundee, OR | 3,203 | 31 | 38% |
| West Wyomissing, PA | 3,203 | 45 | 10% |
| Biscayne Park, FL | 3,203 | 41 | 18% |
| Nyssa, OR | 3,202 | 36 | 28% |
| Hyde Park, PA | 3,202 | 45 | 10% |
| Mamou, LA | 3,203 | 44 | 12% |