| | Mount Pleasant, SC | Johnston, IA | United States |
| Rainfall | 48.3 | 35.9 | 38.1 |
| Snowfall | 0.3 | 34.1 | 27.8 |
| Precipitation Days | 105.6 | 109 | 106.2 |
| Sunny | 211 | 199 | 205 |
| Avg. July High | 89.8 | 85.7 | 85.8 |
| Avg. Jan. Low | 39.3 | 12.5 | 21.7 |
| Comfort Index (higher=better) | 7.2 | 6.9 | 7 |
| UV Index | 5.1 | 4 | 4.3 |
| Elevation ft. | 23 | 830 | 2443 |