| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | 39°F | 59°F | 48°F | 3.3" |
| February | 41°F | 62°F | 50°F | 3.6" |
| March | 48°F | 71°F | 58°F | 3.4" |
| April | 56°F | 79°F | 67°F | 3.1" |
| May | 63°F | 85°F | 73°F | 2.7" |
| June | 71°F | 92°F | 80°F | 4.6" |
| July | 73°F | 93°F | 82°F | 4.4" |
| August | 73°F | 92°F | 81°F | 5.4" |
| September | 68°F | 87°F | 76°F | 3.3" |
| October | 57°F | 78°F | 67°F | 2.3" |
| November | 46°F | 68°F | 56°F | 2.6" |
| December | 43°F | 63°F | 52°F | 4.9" |
| Index | Thomson | Georgia | National |
| Air quality index | 47 | 41 | 42 |
| Pollution index | 335,277 | 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 | 0.001% |
| Benzene | 0.010% |
| Carbon Tetrachloride | 0.001% |
| Lead | 0.000% |
| Mercury | 0.000% |
| City | Population | Air Quality Index | National Avg. |
| Harlem, GA | 3,267 | 47 | 6.0% |
| Appling, GA | 833 | 47 | 6.0% |
| Norwood, GA | 247 | 47 | 6.0% |
| Camak, GA | 312 | 47 | 6.0% |
| Warrenton, GA | 2,084 | 47 | 6.0% |
| Thomson, GA | 6,553 | 47 | 6.0% |
| City | Population | Air Quality Index | National Avg. |
| Santa Teresa, NM | 6,553 | 53 | 6.0% |
| Talent, OR | 6,553 | 36 | 28.0% |
| Eudora, KS | 6,551 | 47 | 6.0% |
| Oneonta, AL | 6,550 | 43 | 14.0% |
| Medina, MN | 6,549 | 46 | 8.0% |
| Thomson, GA | 6,553 | 47 | 6.0% |
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