| 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 | Flowery Branch | Georgia | National |
| Air quality index | 37 | 41 | 42 |
| Pollution index | 496,082 | 1,874,972 | 2,726,193 |
| Measurement | Total |
| Days measured | 340 |
| Days with good air quality | 259 |
| Days with moderate air quality | 81 |
| 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 | 0.002% |
| Lead | 0.001% |
| Mercury | 0.000% |
| City | Population | Air Quality Index | National Avg. |
| Dacula, GA | 6,175 | 37 | 26.0% |
| Cumming, GA | 6,528 | 37 | 26.0% |
| Buford, GA | 16,003 | 37 | 26.0% |
| Sugar Hill, GA | 23,994 | 37 | 26.0% |
| Gainesville, GA | 41,464 | 37 | 26.0% |
| Flowery Branch, GA | 7,896 | 37 | 26.0% |
| City | Population | Air Quality Index | National Avg. |
| Seaford, DE | 7,897 | 36 | 28.0% |
| Sheboygan Falls, WI | 7,898 | 38 | 24.0% |
| McGregor, FL | 7,899 | 36 | 28.0% |
| Jersey Village, TX | 7,900 | 52 | 4.0% |
| Flushing, MI | 7,891 | 38 | 24.0% |
| Flowery Branch, GA | 7,896 | 37 | 26.0% |
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