| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | 32°F | 56°F | 43°F | 3.8" |
| February | 34°F | 59°F | 45°F | 4.6" |
| March | 42°F | 69°F | 54°F | 4.4" |
| April | 49°F | 76°F | 62°F | 3.9" |
| May | 56°F | 82°F | 69°F | 3.2" |
| June | 65°F | 90°F | 77°F | 3.1" |
| July | 68°F | 91°F | 78°F | 4.5" |
| August | 68°F | 90°F | 78°F | 4.2" |
| September | 62°F | 85°F | 72°F | 3.5" |
| October | 49°F | 76°F | 61°F | 3.4" |
| November | 38°F | 66°F | 51°F | 3.5" |
| December | 37°F | 60°F | 47°F | 6.1" |
| Index | Barnesville | Georgia | National |
| Air quality index | 38 | 41 | 50 |
| Pollution index | 448,589 | 1,874,972 | 2,726,193 |
| Measurement | Total |
| Days measured | 365 |
| Days with good air quality | 278 |
| Days with moderate air quality | 84 |
| Days w/ poor A.Q. for sensitive groups | 3 |
| Days with unhealthy air quality | 0 |
| Pollutant | Total |
| Arsenic | 0.010% |
| Benzene | 0.010% |
| Carbon Tetrachloride | 0.001% |
| Lead | 0.002% |
| Mercury | 0.000% |
| City | Population | Air Quality Index | National Avg. |
| Milner, GA | 1,258 | 38 | 24.0% |
| Flovilla, GA | 546 | 38 | 24.0% |
| Hannahs Mill, GA | 3,822 | 38 | 24.0% |
| Orchard Hill, GA | 247 | 38 | 24.0% |
| Aldora, GA | 124 | 38 | 24.0% |
| Barnesville, GA | 6,611 | 38 | 24.0% |
| City | Population | Air Quality Index | National Avg. |
| Buena Vista, VA | 6,610 | 26 | 48.0% |
| Horseheads, NY | 6,608 | 35 | 30.0% |
| Tecumseh, OK | 6,614 | 36 | 28.0% |
| Valley City, ND | 6,615 | 33 | 34.0% |
| Orange Lake, NY | 6,615 | 36 | 28.0% |
| Barnesville, GA | 6,611 | 38 | 24.0% |
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