| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | 38°F | 60°F | 48°F | 4.8" |
| February | 39°F | 63°F | 50°F | 5.5" |
| March | 47°F | 71°F | 58°F | 4.9" |
| April | 54°F | 79°F | 66°F | 5.1" |
| May | 62°F | 85°F | 73°F | 3.5" |
| June | 70°F | 91°F | 80°F | 4.3" |
| July | 73°F | 93°F | 81°F | 4.3" |
| August | 73°F | 92°F | 81°F | 5.4" |
| September | 67°F | 88°F | 77°F | 2.9" |
| October | 56°F | 79°F | 66°F | 2.8" |
| November | 45°F | 69°F | 56°F | 3.9" |
| December | 41°F | 63°F | 51°F | 6.6" |
| Index | Manchester | Georgia | National |
| Air quality index | 42 | 41 | 42 |
| Pollution index | 1,072,930 | 1,874,972 | 2,726,193 |
| Measurement | Total |
| Days measured | 365 |
| Days with good air quality | 257 |
| Days with moderate air quality | 108 |
| Days w/ poor A.Q. for sensitive groups | 0 |
| Days with unhealthy air quality | 0 |
| Pollutant | Total |
| Arsenic | 0.000% |
| Benzene | 0.010% |
| Carbon Tetrachloride | 0.002% |
| Lead | 0.001% |
| Mercury | 0.001% |
| City | Population | Air Quality Index | National Avg. |
| Shiloh, GA | 552 | 42 | 16.0% |
| Waverly Hall, GA | 888 | 42 | 16.0% |
| Woodbury, GA | 1,180 | 42 | 16.0% |
| Sunset Village, GA | 703 | 42 | 16.0% |
| Woodland, GA | 384 | 42 | 16.0% |
| Manchester, GA | 3,982 | 42 | 16.0% |
| City | Population | Air Quality Index | National Avg. |
| Balm, FL | 3,981 | 43 | 14.0% |
| Cleveland, GA | 3,983 | 37 | 26.0% |
| Otsego, MI | 3,980 | 39 | 22.0% |
| Planada, CA | 3,984 | 48 | 4.0% |
| Spencer, OK | 3,985 | 48 | 4.0% |
| Manchester, GA | 3,982 | 42 | 16.0% |
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