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

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As of 10:03 AM PST on November 20, 2025, 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 Richmond, CA with a reading of 1.2.

Over the next 24 hours, the highest UV Index reading in Contra Costa County, CA is expected to be 1.9 in Richmond between 11:00 AM - 12:00 PM PST today.

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Current UV Index in Cities in Contra Costa County, CA

• Acalanes Ridge - 0.8
• Alamo - 1.1
• Alhambra Valley - 1.2
• Antioch - 0.5
• Bay Point - 0.8
• Bethel Island - 0.5
• Blackhawk - 1.1
• Brentwood - 0.5
• Byron - 0.5
• Camino Tassajara - 1.1
• Castle Hill - 1.1
• Clayton - 0.8
• Clyde - 0.8
• Concord - 0.8
• Contra Costa Centre - 0.8
• Crockett - 1.2
• Danville - 1.1
• Diablo - 1.1
• Discovery Bay - 0.3
• East Richmond Heights - 1.2
• El Cerrito - 1.2
• Hercules - 1.2
• Kensington - 1.2
• Knightsen - 0.5
• Lafayette - 0.8
• Martinez - 0.8
• Montalvin Manor - 1.2
• Moraga - 1.1
• Norris Canyon - 1.1
• North Gate - 0.8
• North Richmond - 1.2
• Oakley - 0.5
• Orinda - 1.2
• Pacheco - 0.8
• Pinole - 1.2
• Pittsburg - 0.8
• Pleasant Hill - 0.8
• Port Costa - 1.2
• Reliez Valley - 0.8
• Richmond - 1.2
• Rodeo - 1.2
• Rollingwood - 1.2
• San Miguel - 0.8
• San Pablo - 1.2
• San Ramon - 1.1
• Saranap - 0.8
• Shell Ridge - 0.8
• Tara Hills - 1.2
• Vine Hill - 0.8
• Walnut Creek - 0.8