| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | 33°F | 62°F | 46°F | 3.3" |
| February | 35°F | 64°F | 49°F | 4.2" |
| March | 41°F | 73°F | 56°F | 3.8" |
| April | 48°F | 80°F | 64°F | 3.4" |
| May | 57°F | 86°F | 71°F | 3.1" |
| June | 66°F | 93°F | 79°F | 4.1" |
| July | 69°F | 95°F | 81°F | 4.2" |
| August | 70°F | 94°F | 80°F | 5.0" |
| September | 63°F | 89°F | 75°F | 2.8" |
| October | 50°F | 81°F | 64°F | 2.5" |
| November | 39°F | 71°F | 54°F | 2.9" |
| December | 37°F | 65°F | 50°F | 5.3" |
| Index | Garfield | Georgia | National |
| Air quality index | 42 | 41 | 50 |
| Pollution index | 353,268 | 3,237,553 | 5,066,862 |
| Measurement | Total |
| Days measured | 365 |
| Days with good air quality | 251 |
| Days with moderate air quality | 112 |
| Days w/ poor A.Q. for sensitive groups | 2 |
| Days with unhealthy air quality |
| Pollutant | Total |
| Arsenic | 0.003% |
| Benzene | 0.010% |
| Carbon Tetrachloride | 0.001% |
| Lead | 0.003% |
| Mercury | 0.000% |
| City, State | Population | Air Quality Index | National Avg. |
| Millen, GA | 2,972 | 42 | 16% |
| Summertown, GA | 256 | 42 | 16% |
| Nunez, GA | 96 | 42 | 16% |
| Swainsboro, GA | 7,504 | 42 | 16% |
| Canoochee, GA | 106 | 42 | 16% |
| Garfield, GA | 139 | 42 | 16% |
| City, State | Population | Air Quality Index | National Avg. |
| Boston, IN | 139 | 6 | 88% |
| St. Donatus, IA | 139 | 32 | 36% |
| Theodosia, MO | 139 | 36 | 28% |
| Somers, IA | 139 | 37 | 26% |
| Edmonson, TX | 139 | 26 | 48% |
| Garfield, GA | 139 | 42 | 16% |