| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | 34°F | 60°F | 46°F | 2.9" |
| February | 36°F | 63°F | 49°F | 3.7" |
| March | 43°F | 72°F | 57°F | 3.3" |
| April | 51°F | 80°F | 66°F | 3.1" |
| May | 59°F | 86°F | 72°F | 3.2" |
| June | 69°F | 92°F | 80°F | 5.2" |
| July | 72°F | 94°F | 82°F | 5.4" |
| August | 72°F | 93°F | 81°F | 6.1" |
| September | 65°F | 88°F | 76°F | 3.5" |
| October | 52°F | 79°F | 65°F | 4.0" |
| November | 40°F | 69°F | 54°F | 3.2" |
| December | 38°F | 63°F | 50°F | 4.6" |
| Index | Cayce | South Carolina | National |
| Air quality index | 43 | 37 | 42 |
| Pollution index | 13,023,700 | 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 | 2.600% |
| Benzene | 0.080% |
| Carbon Tetrachloride | 0.060% |
| Lead | 0.120% |
| Mercury | 0.110% |
| City | Population | Air Quality Index | National Avg. |
| Dentsville, SC | 16,145 | 43 | 14.0% |
| Pine Ridge, SC | 2,871 | 43 | 14.0% |
| Lexington, SC | 22,445 | 43 | 14.0% |
| St. Andrews, SC | 22,188 | 43 | 14.0% |
| Springdale, SC | 2,977 | 43 | 14.0% |
| Cayce, SC | 14,389 | 43 | 14.0% |
| City | Population | Air Quality Index | National Avg. |
| Mountain View County, AB | 14,390 | n/a | |
| Deming, NM | 14,383 | 12 | 76.0% |
| Springdale, NJ | 14,396 | 51 | 2.0% |
| Reidsville, NC | 14,401 | 43 | 14.0% |
| South Stormont, ON | 14,401 | n/a | |
| Cayce, SC | 14,389 | 43 | 14.0% |