Marin County, CA: Current UV Index and Hourly Forecast

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As of 9:49 AM PDT on June 27, 2025, all 31 cities in Marin County, CA in our database have a UV Index reading of Moderate. The city with the highest UV Index reading right now is San Rafael, CA with a reading of 2.7.

Over the next 24 hours, the highest UV Index reading in Marin County, CA is expected to be 10 in Sausalito between 1:00 PM - 2:00 PM PDT today.

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Current UV Index in Cities in Marin County, CA

• Alto - 2.7
• Belvedere - 2.7
• Black Point-Green Point - 2.7
• Bolinas - 2.7
• Corte Madera - 2.7
• Dillon Beach - 2.7
• Fairfax - 2.7
• Inverness - 2.7
• Kentfield - 2.7
• Lagunitas-Forest Knolls - 2.7
• Larkspur - 2.7
• Lucas Valley-Marinwood - 2.7
• Marin City - 2.7
• Mill Valley - 2.7
• Muir Beach - 2.7
• Nicasio - 2.7
• Novato - 2.7
• Point Reyes Station - 2.7
• Ross - 2.7
• San Anselmo - 2.7
• San Geronimo - 2.7
• San Rafael - 2.7
• Santa Venetia - 2.7
• Sausalito - 2.7
• Sleepy Hollow - 2.7
• Stinson Beach - 2.7
• Strawberry - 2.7
• Tamalpais-Homestead Valley - 2.7
• Tiburon - 2.7
• Tomales - 2.7
• Woodacre - 2.7