As of 8:51 AM EST on November 21, 2025, all 11 cities in St. Mary's County, MD in our database have a UV Index reading of Low. The city with the highest UV Index reading right now is California, MD with a reading of 0.2.
Over the next 24 hours, the highest UV Index reading in St. Mary's County, MD is expected to be 1.9 in St. George Island 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 |