Contra Costa County, CA: Current UV Index and Hourly Forecast

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As of 8:16 AM PDT on August 11, 2026, all 50 cities in Contra Costa County, CA in our database have a UV Index reading of Low. The city with the highest UV Index reading right now is Concord, CA with a reading of 0.8.

Over the next 24 hours, the highest UV Index reading in Contra Costa County, CA is expected to be 8.9 in Concord between 1:00 PM - 2:00 PM PDT today.

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Current UV Index in Cities in Contra Costa County, CA

• Acalanes Ridge - 0.8
• Alamo - 0.8
• Alhambra Valley - 0.7
• Antioch - 0.8
• Bay Point - 0.8
• Bethel Island - 0.8
• Blackhawk - 0.8
• Brentwood - 0.8
• Byron - 0.8
• Camino Tassajara - 0.8
• Castle Hill - 0.8
• Clayton - 0.8
• Clyde - 0.8
• Concord - 0.8
• Contra Costa Centre - 0.8
• Crockett - 0.7
• Danville - 0.8
• Diablo - 0.8
• Discovery Bay - 0.8
• East Richmond Heights - 0.7
• El Cerrito - 0.7
• Hercules - 0.7
• Kensington - 0.7
• Knightsen - 0.8
• Lafayette - 0.8
• Martinez - 0.8
• Montalvin Manor - 0.7
• Moraga - 0.8
• Norris Canyon - 0.8
• North Gate - 0.8
• North Richmond - 0.7
• Oakley - 0.8
• Orinda - 0.7
• Pacheco - 0.8
• Pinole - 0.7
• Pittsburg - 0.8
• Pleasant Hill - 0.8
• Port Costa - 0.7
• Reliez Valley - 0.8
• Richmond - 0.7
• Rodeo - 0.7
• Rollingwood - 0.7
• San Miguel - 0.8
• San Pablo - 0.7
• San Ramon - 0.8
• Saranap - 0.8
• Shell Ridge - 0.8
• Tara Hills - 0.7
• Vine Hill - 0.8
• Walnut Creek - 0.8