UV Index Today in Marin County, California (CA)
Wednesday, November 4, 2026 -9:17 AM PST (GMT-8)
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The average maximum UV Index today across 29 locations in Marin County, California (CA), is 3.4. The highest projected maximum is 3.5 in San Francisco at 12:00 PM PST, while the lowest projected maximum is 3.2 in Petaluma Center at 12:00 PM PST.
Tomorrow, the average maximum UV Index across those same locations is expected to be 3.3. The highest projected maximum is 3.4 in San Francisco at 12:00 PM PST, and the lowest projected maximum is 3.2 in Bodega Bay at 12:00 PM PST.
29 Places in Marin County, California (CA)
Maximum UV Index Today