| 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 | Alto | Georgia | National |
| Air quality index | 37 | 41 | 42 |
| Pollution index | 394,277 | 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 | 0.001% |
| Lead | 0.001% |
| Mercury | 0.000% |
| City | Population | Air Quality Index | National Avg. |
| Demorest, GA | 2,247 | 37 | 26.0% |
| Gillsville, GA | 317 | 37 | 26.0% |
| Baldwin, GA | 3,593 | 37 | 26.0% |
| Raoul, GA | 2,720 | 37 | 26.0% |
| Homer, GA | 1,595 | 37 | 26.0% |
| Alto, GA | 1,259 | 37 | 26.0% |
| City | Population | Air Quality Index | National Avg. |
| Martinsville, IL | 1,259 | 45 | 10.0% |
| Frampton, QC | 1,259 | n/a | |
| Sanford, CO | 1,260 | 15 | 70.0% |
| Surf City, NJ | 1,260 | 37 | 26.0% |
| Bushyhead, OK | 1,258 | 45 | 10.0% |
| Alto, GA | 1,259 | 37 | 26.0% |
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