| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | 46°F | 64°F | 54°F | 4.5" |
| February | 48°F | 67°F | 56°F | 3.0" |
| March | 55°F | 73°F | 63°F | 12.7" |
| April | 61°F | 79°F | 69°F | 7.3" |
| May | 67°F | 84°F | 75°F | 4.3" |
| June | 73°F | 89°F | 80°F | 5.2" |
| July | 75°F | 90°F | 81°F | 4.4" |
| August | 75°F | 90°F | 81°F | 4.9" |
| September | 71°F | 87°F | 78°F | 6.4" |
| October | 60°F | 80°F | 69°F | 3.9" |
| November | 51°F | 72°F | 60°F | 3.1" |
| December | 49°F | 67°F | 56°F | 3.7" |
| Index | Franklin | Louisiana | National |
| Air quality index | 41 | 106 | 42 |
| Pollution index | 1,868,490 | 2,526,475 | 2,726,193 |
| Measurement | Total |
| Days measured | 365 |
| Days with good air quality | 280 |
| Days with moderate air quality | 85 |
| Days w/ poor A.Q. for sensitive groups | 0 |
| Days with unhealthy air quality | 0 |
| Pollutant | Total |
| Arsenic | 0.002% |
| Benzene | 0.020% |
| Carbon Tetrachloride | 0.002% |
| Lead | 0.020% |
| Mercury | 0.002% |
| City | Population | Air Quality Index | National Avg. |
| Charenton, LA | 1,560 | 41 | 18.0% |
| Sorrel, LA | 560 | 41 | 18.0% |
| Bayou Vista, LA | 4,346 | 41 | 18.0% |
| Glencoe, LA | 258 | 41 | 18.0% |
| Patterson, LA | 5,844 | 41 | 18.0% |
| Franklin, LA | 6,844 | 41 | 18.0% |
| City | Population | Air Quality Index | National Avg. |
| Fircrest, WA | 6,844 | 30 | 40.0% |
| Hebron, KY | 6,845 | 54 | 8.0% |
| Mount Healthy, OH | 6,845 | 54 | 8.0% |
| Milford, OH | 6,840 | 54 | 8.0% |
| Wescosville, PA | 6,848 | 42 | 16.0% |
| Franklin, LA | 6,844 | 41 | 18.0% |
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