| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | 36°F | 55°F | 45°F | 5.9" |
| February | 36°F | 56°F | 45°F | 6.9" |
| March | 43°F | 67°F | 55°F | 11.0" |
| April | 48°F | 71°F | 59°F | 6.6" |
| May | 56°F | 79°F | 68°F | 6.1" |
| June | 66°F | 86°F | 75°F | 8.7" |
| July | 70°F | 86°F | 77°F | 6.9" |
| August | 72°F | 92°F | 80°F | 9.5" |
| September | 65°F | 85°F | 75°F | 4.2" |
| October | 55°F | 74°F | 64°F | 6.6" |
| November | 42°F | 64°F | 52°F | 4.7" |
| December | 36°F | 54°F | 44°F | 7.6" |
| Index | Jefferson | Georgia | National |
| Air quality index | 44 | 41 | 42 |
| Pollution index | 394,277 | 1,874,972 | 2,726,193 |
| Measurement | Total |
| Days measured | 365 |
| Days with good air quality | 245 |
| Days with moderate air quality | 120 |
| Days w/ poor A.Q. for sensitive groups | 0 |
| Days with unhealthy air quality | 0 |
| Pollutant | Total |
| Arsenic | 0.010% |
| Benzene | 0.010% |
| Carbon Tetrachloride | 0.001% |
| Lead | 0.001% |
| Mercury | 0.000% |
| City | Population | Air Quality Index | National Avg. |
| Auburn, GA | 7,519 | 37 | 26.0% |
| Gainesville, GA | 41,464 | 37 | 26.0% |
| Braselton, GA | 12,178 | 37 | 26.0% |
| Talmo, GA | 242 | 37 | 26.0% |
| Gillsville, GA | 317 | 37 | 26.0% |
| Jefferson, GA | 11,619 | 44 | 12.0% |
| City | Population | Air Quality Index | National Avg. |
| Winton, CA | 11,619 | 48 | 4.0% |
| View Park-Windsor Hills, CA | 11,621 | 72 | 44.0% |
| Beachwood, OH | 11,627 | 50 | = 100 |
| Hillsborough, CA | 11,608 | 43 | 14.0% |
| Wyandanch, NY | 11,632 | 51 | 2.0% |
| Jefferson, GA | 11,619 | 44 | 12.0% |
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