As of 1:03 PM PDT on April 11, 2026, out of 31 cities in Marin County, CA in our database, 21 cities (68%) have a UV Index reading of High, 8 cities (26%) have a UV Index reading of Moderate, while 2 cities (6%) have a UV Index reading of Low. The city with the highest UV Index reading right now is Sausalito, CA with a reading of 5.9.
Over the next 24 hours, the highest UV Index reading in Marin County, CA is expected to be 5.9 in Sausalito between 1:00 PM - 2:00 PM PDT today.
| Range | 0 - 2 | 3 - 5 | 6 - 7 | 8 - 10 | 11+ |
|---|---|---|---|---|---|
| Color | |||||
| Risk | Low | Moderate | High | Very High | Extreme |