| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | 31°F | 56°F | 43°F | 4.0" |
| February | 33°F | 59°F | 45°F | 3.1" |
| March | 40°F | 68°F | 53°F | 4.3" |
| April | 48°F | 76°F | 62°F | 4.1" |
| May | 57°F | 82°F | 69°F | 3.9" |
| June | 66°F | 90°F | 77°F | 3.8" |
| July | 69°F | 92°F | 79°F | 5.1" |
| August | 69°F | 90°F | 78°F | 4.8" |
| September | 63°F | 85°F | 72°F | 3.8" |
| October | 50°F | 76°F | 62°F | 4.0" |
| November | 39°F | 66°F | 52°F | 3.3" |
| December | 35°F | 58°F | 46°F | 5.6" |
| Index | Fountain Inn | South Carolina | National |
| Air quality index | 46 | 37 | 42 |
| Pollution index | 7,804,180 | 3,620,438 | 2,726,193 |
| Measurement | Total |
| Days measured | 365 |
| Days with good air quality | 222 |
| Days with moderate air quality | 141 |
| Days w/ poor A.Q. for sensitive groups | 2 |
| Days with unhealthy air quality | 0 |
| Pollutant | Total |
| Arsenic | 0.010% |
| Benzene | 0.070% |
| Carbon Tetrachloride | 0.020% |
| Lead | 0.050% |
| Mercury | 0.003% |
| City | Population | Air Quality Index | National Avg. |
| Pelzer, SC | 1,653 | 31 | 38.0% |
| Princeton, SC | 60 | 31 | 38.0% |
| Roebuck, SC | 2,768 | 44 | 12.0% |
| Woodruff, SC | 4,333 | 44 | 12.0% |
| Enoree, SC | 560 | 44 | 12.0% |
| Fountain Inn, SC | 10,127 | 46 | 8.0% |
| City | Population | Air Quality Index | National Avg. |
| Highland, IL | 10,122 | 54 | 8.0% |
| Orange Cove, CA | 10,120 | 66 | 32.0% |
| Rotonda, FL | 10,117 | 36 | 28.0% |
| Linthicum, MD | 10,116 | 46 | 8.0% |
| Saint-Hippolyte, QC | 10,115 | n/a | |
| Fountain Inn, SC | 10,127 | 46 | 8.0% |
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