| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | 39°F | 63°F | 50°F | 6.6" |
| February | 41°F | 67°F | 53°F | 7.7" |
| March | 48°F | 73°F | 60°F | 7.4" |
| April | 54°F | 80°F | 67°F | 9.5" |
| May | 62°F | 86°F | 73°F | 7.6" |
| June | 70°F | 91°F | 80°F | 10.6" |
| July | 72°F | 93°F | 81°F | 9.7" |
| August | 73°F | 92°F | 81°F | 9.9" |
| September | 68°F | 87°F | 76°F | 8.3" |
| October | 57°F | 80°F | 67°F | 7.5" |
| November | 46°F | 72°F | 57°F | 5.5" |
| December | 44°F | 67°F | 54°F | 6.6" |
| Index | Register | Georgia | National |
| Air quality index | 39 | 41 | 50 |
| Pollution index | 353,268 | 3,237,553 | 5,066,862 |
| Measurement | Total |
| Days measured | 365 |
| Days with good air quality | 295 |
| Days with moderate air quality | 70 |
| Days w/ poor A.Q. for sensitive groups | 0 |
| 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, State | Population | Air Quality Index | National Avg. |
| Cobbtown, GA | 360 | 39 | 22% |
| Hagan, GA | 1,094 | 39 | 22% |
| Pulaski, GA | 284 | 39 | 22% |
| Collins, GA | 464 | 39 | 22% |
| Manassas, GA | 113 | 39 | 22% |
| Register, GA | 144 | 39 | 22% |
| City, State | Population | Air Quality Index | National Avg. |
| Limaville, OH | 144 | 46 | 8% |
| Sallis, MS | 144 | 33 | 34% |
| Wann, OK | 144 | 38 | 24% |
| Woodstock, MN | 144 | 32 | 36% |
| Wyeville, WI | 144 | 35 | 30% |
| Register, GA | 144 | 39 | 22% |
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