| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | 44°F | 63°F | 53°F | 4.1" |
| February | 46°F | 65°F | 55°F | 5.4" |
| March | 52°F | 71°F | 61°F | 3.8" |
| April | 59°F | 76°F | 68°F | 4.5" |
| May | 66°F | 83°F | 75°F | 3.2" |
| June | 73°F | 89°F | 81°F | 7.5" |
| July | 75°F | 90°F | 82°F | 6.0" |
| August | 75°F | 89°F | 82°F | 7.0" |
| September | 71°F | 87°F | 78°F | 5.3" |
| October | 60°F | 80°F | 70°F | 5.3" |
| November | 50°F | 71°F | 60°F | 4.0" |
| December | 47°F | 66°F | 56°F | 4.7" |
| Index | Lillian | Alabama | National |
| Air quality index | 41 | 37 | 50 |
| Pollution index | 4,186,460 | 4,051,223 | 5,066,862 |
| Measurement | Total |
| Days measured | 365 |
| Days with good air quality | 279 |
| Days with moderate air quality | 85 |
| Days w/ poor A.Q. for sensitive groups | 1 |
| Days with unhealthy air quality | 0 |
| Pollutant | Total |
| Arsenic | 0.010% |
| Benzene | 0.060% |
| Carbon Tetrachloride | 0.010% |
| Lead | 0.050% |
| Mercury | 0.001% |
| City, State | Population | Air Quality Index | National Avg. |
| Foley, AL | 16,741 | 37 | 26% |
| Elberta, AL | 1,400 | 37 | 26% |
| Summerdale, AL | 910 | 37 | 26% |
| Ensley, FL | 22,101 | 41 | 18% |
| Ferry Pass, FL | 33,060 | 41 | 18% |
| Lillian, AL | 1,298 | 41 | 18% |
| City, State | Population | Air Quality Index | National Avg. |
| South Gull Lake, MI | 1,298 | 38 | 24% |
| St. Elmo, IL | 1,298 | 40 | 20% |
| Dunes City, OR | 1,299 | 19 | 62% |
| Iowa Colony, TX | 1,297 | 52 | 4% |
| Wathena, KS | 1,297 | 43 | 14% |
| Lillian, AL | 1,298 | 41 | 18% |
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