Orange County, CA: Current UV Index and Hourly Forecast

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As of 4:07 PM PDT on July 5, 2025, out of 45 cities in Orange County, CA in our database, 24 cities (53%) have a UV Index reading of Moderate, while 21 cities (47%) have a UV Index reading of High. The city with the highest UV Index reading right now is Rancho Santa Margarita, CA with a reading of 5.7.

Over the next 24 hours, the highest UV Index reading in Orange County, CA is expected to be 11.5 in Rancho Santa Margarita between 1:00 PM - 2:00 PM PDT tomorrow.

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Current UV Index in Cities in Orange County, CA

• Aliso Viejo - 4.9
• Anaheim - 5.6
• Brea - 5.5
• Buena Park - 5
• Costa Mesa - 5
• Coto de Caza - 5.5
• Cypress - 5
• Dana Point - 4.9
• Fountain Valley - 5
• Fullerton - 5.5
• Garden Grove - 5
• Huntington Beach - 5
• Irvine - 5.6
• La Habra - 5.5
• La Palma - 5
• Ladera Ranch - 4.9
• Laguna Beach - 4.9
• Laguna Hills - 4.9
• Laguna Niguel - 4.9
• Laguna Woods - 4.9
• Lake Forest - 5.6
• Las Flores - 5.5
• Los Alamitos - 5
• Midway City - 5
• Mission Viejo - 4.9
• Modjeska - 5.6
• Newport Beach - 4.9
• North Tustin - 5.6
• Orange - 5.6
• Placentia - 5.5
• Rancho Mission Viejo - 5.5
• Rancho Santa Margarita - 5.7
• Rossmoor - 5
• San Clemente - 5.5
• San Juan Capistrano - 4.9
• Santa Ana - 5
• Seal Beach - 5
• Silverado - 5.6
• Stanton - 5
• Trabuco Canyon - 5.7
• Tustin - 5.6
• Villa Park - 5.6
• Westminster - 5
• Williams Canyon - 5.6
• Yorba Linda - 5.5