| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | 33°F | 52°F | 42°F | 5.0" |
| February | 35°F | 55°F | 44°F | 4.0" |
| March | 43°F | 65°F | 54°F | 4.4" |
| April | 51°F | 74°F | 62°F | 4.5" |
| May | 59°F | 80°F | 69°F | 4.2" |
| June | 67°F | 88°F | 77°F | 3.6" |
| July | 70°F | 89°F | 78°F | 4.2" |
| August | 70°F | 88°F | 78°F | 5.2" |
| September | 64°F | 82°F | 72°F | 4.1" |
| October | 52°F | 73°F | 62°F | 4.5" |
| November | 42°F | 63°F | 52°F | 3.8" |
| December | 38°F | 56°F | 46°F | 5.8" |
| Index | Gainesville | Georgia | National |
| Air quality index | 42 | 41 | 50 |
| Pollution index | 496,082 | 3,237,553 | 5,066,862 |
| Measurement | Total |
| Days measured | 342 |
| Days with good air quality | 215 |
| Days with moderate air quality | 127 |
| Days w/ poor A.Q. for sensitive groups | |
| Days with unhealthy air quality |
| Pollutant | Total |
| Arsenic | 0.010% |
| Benzene | 0.010% |
| Carbon Tetrachloride | 0.002% |
| Lead | 0.001% |
| Mercury | 0.000% |
| City, State | Population | Air Quality Index | National Avg. |
| Jefferson, GA | 9,946 | 39 | 22% |
| Buford, GA | 13,927 | 42 | 16% |
| Hoschton, GA | 1,782 | 42 | 16% |
| Pendergrass, GA | 481 | 42 | 16% |
| Talmo, GA | 194 | 42 | 16% |
| Gainesville, GA | 37,906 | 42 | 16% |
| City, State | Population | Air Quality Index | National Avg. |
| Roy, UT | 37,853 | 49 | 2% |
| Lima, OH | 37,836 | 30 | 40% |
| Brookfield, WI | 37,991 | 45 | 10% |
| Wheeling, IL | 38,008 | 60 | 20% |
| Apache Junction, AZ | 37,775 | 74 | 48% |
| Gainesville, GA | 37,906 | 42 | 16% |