| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | 41°F | 62°F | 50°F | 8.9" |
| February | 44°F | 65°F | 53°F | 6.4" |
| March | 51°F | 73°F | 61°F | 7.6" |
| April | 58°F | 79°F | 67°F | 9.2" |
| May | 64°F | 85°F | 74°F | 11.0" |
| June | 71°F | 91°F | 80°F | 11.0" |
| July | 73°F | 92°F | 81°F | 10.2" |
| August | 73°F | 93°F | 81°F | 12.5" |
| September | 68°F | 88°F | 77°F | 7.7" |
| October | 57°F | 81°F | 68°F | 13.5" |
| November | 49°F | 71°F | 59°F | 8.7" |
| December | 44°F | 63°F | 52°F | 9.7" |
| Index | Longville | Louisiana | National |
| Air quality index | 45 | 106 | 42 |
| Pollution index | 2,818,820 | 2,526,475 | 2,726,193 |
| Measurement | Total |
| Days measured | 365 |
| Days with good air quality | 239 |
| Days with moderate air quality | 126 |
| Days w/ poor A.Q. for sensitive groups | 0 |
| Days with unhealthy air quality | 0 |
| Pollutant | Total |
| Arsenic | 0.010% |
| Benzene | 0.020% |
| Carbon Tetrachloride | 0.050% |
| Lead | 0.010% |
| Mercury | 0.010% |
| City | Population | Air Quality Index | National Avg. |
| Singer, LA | 306 | 45 | 10.0% |
| Reeves, LA | 171 | 45 | 10.0% |
| DeQuincy, LA | 3,087 | 45 | 10.0% |
| Oretta, LA | 638 | 45 | 10.0% |
| Longville, LA | 170 | 45 | 10.0% |
| City | Population | Air Quality Index | National Avg. |
| White Mountain, AK | 170 | 38 | 24.0% |
| Palominas, AZ | 170 | 45 | 10.0% |
| Santa Claus, GA | 170 | 26 | 48.0% |
| Haverhill, IA | 170 | 37 | 26.0% |
| Webster, IA | 170 | 35 | 30.0% |
| Longville, LA | 170 | 45 | 10.0% |
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