| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | 40°F | 63°F | 51°F | 4.0" |
| February | 39°F | 65°F | 51°F | 3.5" |
| March | 46°F | 72°F | 58°F | 3.7" |
| April | 52°F | 79°F | 65°F | 4.2" |
| May | 61°F | 86°F | 73°F | 4.1" |
| June | 69°F | 91°F | 79°F | 5.8" |
| July | 71°F | 93°F | 81°F | 4.0" |
| August | 73°F | 92°F | 81°F | 6.4" |
| September | 68°F | 88°F | 77°F | 3.8" |
| October | 58°F | 80°F | 67°F | 4.1" |
| November | 46°F | 71°F | 57°F | 2.4" |
| December | 43°F | 66°F | 53°F | 5.1" |
| Index | Alston | Georgia | National |
| Air quality index | 26 | 41 | 42 |
| Pollution index | 1,649,070 | 1,874,972 | 2,726,193 |
| Measurement | Total |
| Days measured | 121 |
| Days with good air quality | 107 |
| Days with moderate air quality | 14 |
| Days w/ poor A.Q. for sensitive groups | 0 |
| Days with unhealthy air quality | 0 |
| Pollutant | Total |
| Arsenic | 0.050% |
| Benzene | 0.020% |
| Carbon Tetrachloride | 0.002% |
| Lead | 0.020% |
| Mercury | 0.001% |
| City | Population | Air Quality Index | National Avg. |
| Higgston, GA | 356 | 26 | 48.0% |
| Vidalia, GA | 10,380 | 26 | 48.0% |
| Mount Vernon, GA | 2,537 | 26 | 48.0% |
| Lyons, GA | 4,263 | 26 | 48.0% |
| Ailey, GA | 595 | 26 | 48.0% |
| Alston, GA | 180 | 26 | 48.0% |
| City | Population | Air Quality Index | National Avg. |
| Fort Apache, AZ | 180 | 44 | 12.0% |
| San Simon, AZ | 180 | 37 | 26.0% |
| Rentz, GA | 180 | 38 | 24.0% |
| Auburn, IA | 180 | 37 | 26.0% |
| Fostoria, IA | 180 | 35 | 30.0% |
| Alston, GA | 180 | 26 | 48.0% |
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