| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | 35°F | 58°F | 45°F | 5.9" |
| February | 37°F | 63°F | 49°F | 6.6" |
| March | 44°F | 70°F | 56°F | 7.3" |
| April | 53°F | 78°F | 65°F | 6.5" |
| May | 61°F | 84°F | 72°F | 6.9" |
| June | 69°F | 91°F | 79°F | 6.7" |
| July | 72°F | 92°F | 81°F | 9.1" |
| August | 70°F | 91°F | 79°F | 8.3" |
| September | 65°F | 87°F | 74°F | 11.1" |
| October | 53°F | 78°F | 64°F | 7.9" |
| November | 41°F | 68°F | 53°F | 7.0" |
| December | 40°F | 63°F | 50°F | 8.0" |
| Index | Perry | South Carolina | National |
| Air quality index | 43 | 37 | 42 |
| Pollution index | 5,277,200 | 3,620,438 | 2,726,193 |
| Measurement | Total |
| Days measured | 365 |
| Days with good air quality | 264 |
| Days with moderate air quality | 99 |
| Days w/ poor A.Q. for sensitive groups | 2 |
| Days with unhealthy air quality | 0 |
| Pollutant | Total |
| Arsenic | 0.690% |
| Benzene | 0.040% |
| Carbon Tetrachloride | 0.010% |
| Lead | 0.040% |
| Mercury | 0.090% |
| City | Population | Air Quality Index | National Avg. |
| Norway, SC | 392 | 43 | 14.0% |
| Swansea, SC | 773 | 43 | 14.0% |
| Livingston, SC | 150 | 43 | 14.0% |
| Salley, SC | 246 | 43 | 14.0% |
| Woodford, SC | 115 | 43 | 14.0% |
| Perry, SC | 236 | 43 | 14.0% |
| City | Population | Air Quality Index | National Avg. |
| Koliganek, AK | 236 | 31 | 38.0% |
| Artois, CA | 236 | 46 | 8.0% |
| Tonyville, CA | 236 | 66 | 32.0% |
| Denton, GA | 236 | 26 | 48.0% |
| Winchester, ID | 236 | 29 | 42.0% |
| Perry, SC | 236 | 43 | 14.0% |
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