Marin County, CA: Current UV Index and Hourly Forecast

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As of 2:22 PM PDT on June 5, 2025, all 31 cities in Marin County, CA in our database have a UV Index reading of Very High. The city with the highest UV Index reading right now is San Rafael, CA with a reading of 8.3.

Over the next 24 hours, the highest UV Index reading in Marin County, CA is expected to be 8.4 in San Rafael between 1:00 PM - 2:00 PM PDT tomorrow.

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Current UV Index in Cities in Marin County, CA

• Alto - 8.3
• Belvedere - 8.3
• Black Point-Green Point - 8.3
• Bolinas - 8
• Corte Madera - 8.3
• Dillon Beach - 8.3
• Fairfax - 8.3
• Inverness - 8
• Kentfield - 8.3
• Lagunitas-Forest Knolls - 8
• Larkspur - 8.3
• Lucas Valley-Marinwood - 8.3
• Marin City - 8.3
• Mill Valley - 8.3
• Muir Beach - 8.3
• Nicasio - 8
• Novato - 8.3
• Point Reyes Station - 8
• Ross - 8.3
• San Anselmo - 8.3
• San Geronimo - 8
• San Rafael - 8.3
• Santa Venetia - 8.3
• Sausalito - 8.3
• Sleepy Hollow - 8.3
• Stinson Beach - 8
• Strawberry - 8.3
• Tamalpais-Homestead Valley - 8.3
• Tiburon - 8.3
• Tomales - 8.3
• Woodacre - 8