| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | 37°F | 57°F | 46°F | 7.9" |
| February | 36°F | 57°F | 46°F | 7.8" |
| March | 44°F | 68°F | 55°F | 14.2" |
| April | 49°F | 73°F | 61°F | 4.5" |
| May | 57°F | 80°F | 68°F | 7.0" |
| June | 67°F | 85°F | 75°F | 10.0" |
| July | 70°F | 88°F | 78°F | 9.0" |
| August | 72°F | 92°F | 81°F | 4.5" |
| September | 66°F | 87°F | 76°F | 6.5" |
| October | 57°F | 77°F | 66°F | 4.5" |
| November | 43°F | 66°F | 54°F | 5.3" |
| December | 37°F | 57°F | 47°F | 8.3" |
| Index | Pendleton | South Carolina | National |
| Air quality index | 41 | 37 | 42 |
| Pollution index | 770,308 | 3,620,438 | 2,726,193 |
| Measurement | Total |
| Days measured | 365 |
| Days with good air quality | 308 |
| Days with moderate air quality | 56 |
| Days w/ poor A.Q. for sensitive groups | 1 |
| Days with unhealthy air quality | 0 |
| Pollutant | Total |
| Arsenic | 0.010% |
| Benzene | 0.010% |
| Carbon Tetrachloride | 0.001% |
| Lead | 0.004% |
| Mercury | 0.000% |
| City | Population | Air Quality Index | National Avg. |
| Reed Creek, GA | 2,751 | 31 | 38.0% |
| Northlake, SC | 3,684 | 31 | 38.0% |
| Centerville, SC | 6,816 | 31 | 38.0% |
| Anderson, SC | 27,387 | 31 | 38.0% |
| Homeland Park, SC | 6,570 | 31 | 38.0% |
| Pendleton, SC | 3,245 | 41 | 18.0% |
| City | Population | Air Quality Index | National Avg. |
| Chickamauga, GA | 3,245 | 46 | 8.0% |
| Garnett, KS | 3,245 | 22 | 56.0% |
| Pottsgrove, PA | 3,245 | 42 | 16.0% |
| Saint-Côme--Linière, QC | 3,244 | n/a | |
| Choccolocco, AL | 3,246 | 38 | 24.0% |
| Pendleton, SC | 3,245 | 41 | 18.0% |
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