Sonoma County, CA: Current UV Index and Hourly Forecast

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As of 12:31 PM PDT on April 1, 2025, all 38 cities in Sonoma County, CA in our database have a UV Index reading of Moderate. The city with the highest UV Index reading right now is Santa Rosa, CA with a reading of 4.6.

Over the next 24 hours, the highest UV Index reading in Sonoma County, CA is expected to be 5.3 in Guerneville between 1:00 PM - 2:00 PM PDT today.

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Current UV Index in Cities in Sonoma County, CA

• Bloomfield - 4.6
• Bodega - 4.6
• Bodega Bay - 4.6
• Boyes Hot Springs - 4.6
• Carmet - 4.6
• Cazadero - 4.6
• Cloverdale - 4.1
• Cotati - 4.6
• El Verano - 4.6
• Eldridge - 4.6
• Fetters Hot Springs-Agua Caliente - 4.6
• Forestville - 4.6
• Fulton - 4.6
• Geyserville - 4.1
• Glen Ellen - 4.6
• Graton - 4.6
• Guerneville - 4.6
• Healdsburg - 4.6
• Jenner - 4.6
• Kenwood - 4.6
• Larkfield-Wikiup - 4.6
• Monte Rio - 4.6
• Occidental - 4.6
• Penngrove - 4.6
• Petaluma - 4.6
• Petaluma Center - 4.6
• Rohnert Park - 4.6
• Salmon Creek - 4.6
• Santa Rosa - 4.6
• Sea Ranch - 4.2
• Sebastopol - 4.6
• Sereno del Mar - 4.6
• Sonoma - 4.6
• Sonoma State University - 4.6
• Temelec - 4.6
• Timber Cove - 4.1
• Valley Ford - 4.6
• Windsor - 4.6