| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | 32°F | 58°F | 44°F | 4.0" |
| February | 33°F | 59°F | 45°F | 8.1" |
| March | 40°F | 69°F | 53°F | 9.3" |
| April | 43°F | 72°F | 57°F | 4.8" |
| May | 51°F | 81°F | 66°F | 4.7" |
| June | 63°F | 87°F | 74°F | 5.5" |
| July | 68°F | 88°F | 76°F | 12.3" |
| August | 70°F | 91°F | 79°F | 7.5" |
| September | 62°F | 86°F | 73°F | 1.3" |
| October | 51°F | 76°F | 62°F | 2.2" |
| November | 39°F | 67°F | 51°F | 4.6" |
| December | 33°F | 58°F | 45°F | 6.9" |
| Index | Franklin | Georgia | National |
| Air quality index | 52 | 41 | 42 |
| Pollution index | 1,170,060 | 1,874,972 | 2,726,193 |
| Measurement | Total |
| Days measured | 365 |
| Days with good air quality | 162 |
| Days with moderate air quality | 184 |
| Days w/ poor A.Q. for sensitive groups | 18 |
| Days with unhealthy air quality | 1 |
| Pollutant | Total |
| Arsenic | 0.001% |
| Benzene | 0.010% |
| Carbon Tetrachloride | 0.002% |
| Lead | 0.002% |
| Mercury | 0.001% |
| City | Population | Air Quality Index | National Avg. |
| Ephesus, GA | 499 | 38 | 24.0% |
| Graham, AL | 84 | 38 | 24.0% |
| Hogansville, GA | 3,165 | 42 | 16.0% |
| Rock Mills, AL | 434 | 42 | 16.0% |
| Standing Rock, AL | 109 | 42 | 16.0% |
| Franklin, GA | 1,007 | 52 | 4.0% |
| City | Population | Air Quality Index | National Avg. |
| Naalehu, HI | 1,007 | 16 | 68.0% |
| Sidney, IA | 1,007 | 40 | 20.0% |
| Waynetown, IN | 1,007 | 42 | 16.0% |
| Hilltop, MN | 1,007 | 46 | 8.0% |
| Arlington, SD | 1,007 | 42 | 16.0% |
| Franklin, GA | 1,007 | 52 | 4.0% |
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