| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | 39°F | 58°F | 50°F | 9.1" |
| February | 40°F | 59°F | 51°F | 7.0" |
| March | 47°F | 68°F | 59°F | 8.1" |
| April | 52°F | 74°F | 65°F | 7.2" |
| May | 61°F | 81°F | 73°F | 5.8" |
| June | 71°F | 87°F | 79°F | 9.8" |
| July | 74°F | 90°F | 82°F | 8.0" |
| August | 75°F | 93°F | 85°F | 5.4" |
| September | 68°F | 88°F | 80°F | 5.2" |
| October | 57°F | 78°F | 70°F | 9.5" |
| November | 46°F | 70°F | 60°F | 3.7" |
| December | 39°F | 59°F | 51°F | 12.6" |
| Index | Hopkins | South Carolina | National |
| Air quality index | 43 | 37 | 42 |
| Pollution index | 4,798,360 | 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 | 0.002% |
| Benzene | 0.020% |
| Carbon Tetrachloride | 0.002% |
| Lead | 0.001% |
| Mercury | 0.002% |
| City | Population | Air Quality Index | National Avg. |
| Cayce, SC | 13,964 | 43 | 14.0% |
| Gadsden, SC | 983 | 43 | 14.0% |
| Columbia, SC | 134,057 | 43 | 14.0% |
| Swansea, SC | 773 | 43 | 14.0% |
| Dentsville, SC | 15,537 | 43 | 14.0% |
| Hopkins, SC | 2,068 | 43 | 14.0% |
| City | Population | Air Quality Index | National Avg. |
| Roosevelt Gardens, FL | 2,068 | 41 | 18.0% |
| Milton, LA | 2,068 | 41 | 18.0% |
| Thoreau, NM | 2,068 | 17 | 66.0% |
| Weyers Cave, VA | 2,068 | 36 | 28.0% |
| Morgan, GA | 2,067 | 40 | 20.0% |
| Hopkins, SC | 2,068 | 43 | 14.0% |
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