| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | 40°F | 61°F | 49°F | n/a |
| February | 41°F | 64°F | 51°F | n/a |
| March | 48°F | 71°F | 58°F | n/a |
| April | 55°F | 79°F | 66°F | n/a |
| May | 62°F | 85°F | 73°F | n/a |
| June | 70°F | 90°F | 79°F | n/a |
| July | 73°F | 93°F | 82°F | n/a |
| August | 73°F | 92°F | 81°F | n/a |
| September | 67°F | 86°F | 75°F | n/a |
| October | 55°F | 78°F | 66°F | n/a |
| November | 46°F | 69°F | 56°F | n/a |
| December | 45°F | 65°F | 53°F | n/a |
| Index | Norristown | Georgia | National |
| Air quality index | 47 | 41 | 42 |
| Pollution index | 353,268 | 1,874,972 | 2,726,193 |
| Measurement | Total |
| Days measured | 365 |
| Days with good air quality | 219 |
| Days with moderate air quality | 144 |
| Days w/ poor A.Q. for sensitive groups | 2 |
| Days with unhealthy air quality | 0 |
| Pollutant | Total |
| Arsenic | 0.003% |
| Benzene | 0.010% |
| Carbon Tetrachloride | 0.001% |
| Lead | 0.003% |
| Mercury | 0.000% |
| City | Population | Air Quality Index | National Avg. |
| Oak Park, GA | 656 | 26 | 48.0% |
| Soperton, GA | 3,071 | 26 | 48.0% |
| Tarrytown, GA | 90 | 26 | 48.0% |
| Adrian, GA | 722 | 38 | 24.0% |
| Swainsboro, GA | 7,418 | 47 | 6.0% |
| Norristown, GA | 29 | 47 | 6.0% |
| City | Population | Air Quality Index | National Avg. |
| Larsen Bay, AK | 29 | 31 | 38.0% |
| Birdsong, AR | 29 | 45 | 10.0% |
| St. Anthony, IA | 29 | 37 | 26.0% |
| Kaskaskia, IL | 29 | 54 | 8.0% |
| Valley City, IL | 29 | 41 | 18.0% |
| Norristown, GA | 29 | 47 | 6.0% |
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