| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | 37°F | 64°F | 49°F | 9.9" |
| February | 41°F | 67°F | 52°F | 9.4" |
| March | 46°F | 73°F | 58°F | 7.9" |
| April | 57°F | 81°F | 68°F | 10.9" |
| May | 61°F | 86°F | 73°F | 17.6" |
| June | 72°F | 91°F | 80°F | 13.7" |
| July | 72°F | 91°F | 80°F | 9.7" |
| August | 73°F | 92°F | 81°F | 10.1" |
| September | 68°F | 90°F | 77°F | 6.6" |
| October | 56°F | 83°F | 68°F | 5.3" |
| November | 42°F | 70°F | 54°F | 9.7" |
| December | 44°F | 68°F | 54°F | 12.0" |
| Index | Franklinton | Louisiana | National |
| Air quality index | 30 | 106 | 42 |
| Pollution index | 498,493 | 2,526,475 | 2,726,193 |
| Measurement | Total |
| Days measured | 117 |
| Days with good air quality | 104 |
| Days with moderate air quality | 13 |
| Days w/ poor A.Q. for sensitive groups | 0 |
| Days with unhealthy air quality | 0 |
| Pollutant | Total |
| Arsenic | 0.004% |
| Benzene | 0.010% |
| Carbon Tetrachloride | 0.010% |
| Lead | 0.004% |
| Mercury | 0.002% |
| City | Population | Air Quality Index | National Avg. |
| Sun, LA | 521 | 30 | 40.0% |
| Folsom, LA | 841 | 30 | 40.0% |
| Franklinton, LA | 3,709 | 30 | 40.0% |
| City | Population | Air Quality Index | National Avg. |
| North El Monte, CA | 3,709 | 72 | 44.0% |
| Shingle Springs, CA | 3,710 | 52 | 4.0% |
| Emmetsburg, IA | 3,706 | 15 | 70.0% |
| L'Islet, QC | 3,712 | n/a | |
| Odenville, AL | 3,705 | 38 | 24.0% |
| Franklinton, LA | 3,709 | 30 | 40.0% |
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