| | Key Largo, FL | Marathon, FL | United States |
| Rainfall | 50 | 45.1 | 38.1 |
| Snowfall | 0 | 0 | 27.8 |
| Precipitation Days | 118.7 | 99.3 | 106.2 |
| Sunny | 256 | 250 | 205 |
| Avg. July High | 89.1 | 90 | 85.8 |
| Avg. Jan. Low | 61.4 | 62.8 | 21.7 |
| Comfort Index (higher=better) | 6.4 | 6 | 7 |
| UV Index | 7.2 | 7.2 | 4.3 |
| Elevation ft. | 7 | 3 | 2443 |