| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | 35°F | 58°F | 46°F | 4.5" |
| February | 34°F | 58°F | 45°F | 4.3" |
| March | 41°F | 68°F | 54°F | 6.6" |
| April | 47°F | 75°F | 61°F | 4.8" |
| May | 55°F | 82°F | 68°F | 2.9" |
| June | 66°F | 88°F | 76°F | 4.4" |
| July | 70°F | 91°F | 79°F | 6.4" |
| August | 71°F | 94°F | 82°F | 2.7" |
| September | 64°F | 89°F | 76°F | 9.3" |
| October | 54°F | 79°F | 65°F | 7.1" |
| November | 40°F | 68°F | 53°F | 5.8" |
| December | 36°F | 59°F | 46°F | 4.7" |
| Index | Clio | South Carolina | National |
| Air quality index | 30 | 37 | 42 |
| Pollution index | 940,521 | 3,620,438 | 2,726,193 |
| Measurement | Total |
| Days measured | 117 |
| Days with good air quality | 101 |
| Days with moderate air quality | 16 |
| Days w/ poor A.Q. for sensitive groups | |
| Days with unhealthy air quality |
| Pollutant | Total |
| Arsenic | 0.001% |
| Benzene | 0.010% |
| Carbon Tetrachloride | 0.002% |
| Lead | 0.003% |
| Mercury | 0.000% |
| City | Population | Air Quality Index | National Avg. |
| East Laurinburg, NC | 345 | 30 | 40.0% |
| Dillon, SC | 6,358 | 30 | 40.0% |
| Maxton, NC | 2,614 | 30 | 40.0% |
| Gibson, NC | 680 | 30 | 40.0% |
| McColl, SC | 1,682 | 30 | 40.0% |
| Clio, SC | 484 | 30 | 40.0% |
| City | Population | Air Quality Index | National Avg. |
| Mokelumne Hill, CA | 484 | 39 | 22.0% |
| Yatesville, GA | 484 | 38 | 24.0% |
| Sun River Terrace, IL | 484 | 55 | 10.0% |
| Pennock, MN | 484 | 32 | 36.0% |
| Vermillion, MN | 484 | 37 | 26.0% |
| Clio, SC | 484 | 30 | 40.0% |
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