| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | 44°F | 63°F | 52°F | 5.3" |
| February | 43°F | 63°F | 52°F | 3.3" |
| March | 49°F | 71°F | 59°F | 13.2" |
| April | 53°F | 77°F | 64°F | 4.8" |
| May | 63°F | 82°F | 72°F | 7.1" |
| June | 71°F | 87°F | 78°F | 13.1" |
| July | 74°F | 91°F | 82°F | 9.4" |
| August | 75°F | 92°F | 82°F | 6.5" |
| September | 71°F | 88°F | 78°F | 16.2" |
| October | 63°F | 79°F | 70°F | 12.0" |
| November | 50°F | 72°F | 59°F | 8.1" |
| December | 44°F | 65°F | 53°F | 10.6" |
| Index | Richmond Hill | Georgia | National |
| Air quality index | 39 | 41 | 50 |
| Pollution index | 367,918 | 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 | 0.010% |
| Benzene | 0.010% |
| Carbon Tetrachloride | 0.001% |
| Lead | 0.005% |
| Mercury | 0.000% |
| City, State | Population | Air Quality Index | National Avg. |
| Flemington, GA | 845 | 39 | 22% |
| Georgetown, GA | 12,621 | 39 | 22% |
| Pooler, GA | 22,131 | 39 | 22% |
| Riceboro, GA | 678 | 39 | 22% |
| Henderson, GA | 1,681 | 39 | 22% |
| Richmond Hill, GA | 11,501 | 39 | 22% |
| City, State | Population | Air Quality Index | National Avg. |
| Campton Hills, IL | 11,500 | 55 | 10% |
| Bellmawr, NJ | 11,503 | 51 | 2% |
| Yeadon, PA | 11,506 | 51 | 2% |
| Mack, OH | 11,495 | 54 | 8% |
| Camden, AR | 11,515 | 35 | 30% |
| Richmond Hill, GA | 11,501 | 39 | 22% |
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