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

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As of 2:15 PM PDT on May 14, 2025, all 50 cities in Contra Costa 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 Ramon, CA with a reading of 8.

Over the next 24 hours, the highest UV Index reading in Contra Costa County, CA is expected to be 8.7 in Richmond between 1:00 PM - 2:00 PM PDT tomorrow.

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Current UV Index in Cities in Contra Costa County, CA

• Acalanes Ridge - 7.8
• Alamo - 8
• Alhambra Valley - 7.8
• Antioch - 7.7
• Bay Point - 7.8
• Bethel Island - 7.7
• Blackhawk - 8
• Brentwood - 7.7
• Byron - 7.7
• Camino Tassajara - 8
• Castle Hill - 8
• Clayton - 7.8
• Clyde - 7.8
• Concord - 7.8
• Contra Costa Centre - 7.8
• Crockett - 7.8
• Danville - 8
• Diablo - 8
• Discovery Bay - 7.6
• East Richmond Heights - 7.8
• El Cerrito - 7.8
• Hercules - 7.8
• Kensington - 7.8
• Knightsen - 7.7
• Lafayette - 7.8
• Martinez - 7.8
• Montalvin Manor - 7.8
• Moraga - 8
• Norris Canyon - 8
• North Gate - 7.8
• North Richmond - 7.8
• Oakley - 7.7
• Orinda - 7.8
• Pacheco - 7.8
• Pinole - 7.8
• Pittsburg - 7.8
• Pleasant Hill - 7.8
• Port Costa - 7.8
• Reliez Valley - 7.8
• Richmond - 7.8
• Rodeo - 7.8
• Rollingwood - 7.8
• San Miguel - 7.8
• San Pablo - 7.8
• San Ramon - 8
• Saranap - 7.8
• Shell Ridge - 7.8
• Tara Hills - 7.8
• Vine Hill - 7.8
• Walnut Creek - 7.8