As of 10:08 AM EST on March 6, 2026, all 13 cities in Monroe County, FL in our database have a UV Index reading of Moderate. The city with the highest UV Index reading right now is Marathon, FL with a reading of 5.3.
Over the next 24 hours, the highest UV Index reading in Monroe County, FL is expected to be 9.2 in Big Pine Key between 12:00 PM - 1:00 PM EST today.
| Range | 0 - 2 | 3 - 5 | 6 - 7 | 8 - 10 | 11+ |
|---|---|---|---|---|---|
| Color | |||||
| Risk | Low | Moderate | High | Very High | Extreme |