| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | 35°F | 57°F | 45°F | 4.2" |
| February | 37°F | 60°F | 47°F | 3.4" |
| March | 45°F | 69°F | 56°F | 4.7" |
| April | 53°F | 77°F | 64°F | 5.3" |
| May | 60°F | 83°F | 71°F | 4.5" |
| June | 69°F | 91°F | 79°F | 3.2" |
| July | 71°F | 93°F | 81°F | 3.3" |
| August | 71°F | 94°F | 81°F | 4.2" |
| September | 64°F | 88°F | 75°F | 3.4" |
| October | 52°F | 78°F | 63°F | 4.7" |
| November | 43°F | 67°F | 54°F | 3.8" |
| December | 37°F | 58°F | 46°F | 6.0" |
| Index | Lillie | Louisiana | National |
| Air quality index | 35 | 106 | 42 |
| Pollution index | 762,685 | 2,526,475 | 2,726,193 |
| Measurement | Total |
| Days measured | 241 |
| Days with good air quality | 196 |
| Days with moderate air quality | 45 |
| 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 | 0.003% |
| Mercury | 0.000% |
| City | Population | Air Quality Index | National Avg. |
| Bernice, LA | 1,686 | 35 | 30.0% |
| Lisbon, LA | 230 | 35 | 30.0% |
| Spearsville, LA | 221 | 35 | 30.0% |
| Dubach, LA | 1,014 | 35 | 30.0% |
| Junction City, AR | 681 | 35 | 30.0% |
| Lillie, LA | 103 | 35 | 30.0% |
| City | Population | Air Quality Index | National Avg. |
| Broomtown, AL | 103 | 39 | 22.0% |
| Fargo, AR | 103 | 45 | 10.0% |
| Sedalia, CO | 103 | 58 | 16.0% |
| Manassas, GA | 103 | 39 | 22.0% |
| Matthews, GA | 103 | 47 | 6.0% |
| Lillie, LA | 103 | 35 | 30.0% |
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