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

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As of 3:12 PM PDT on March 20, 2025, all 50 cities in Contra Costa County, CA in our database have a UV Index reading of Moderate. The city with the highest UV Index reading right now is Richmond, CA with a reading of 3.8.

Over the next 24 hours, the highest UV Index reading in Contra Costa County, CA is expected to be 5.2 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 - 3.7
• Alamo - 3.6
• Alhambra Valley - 3.8
• Antioch - 3.6
• Bay Point - 3.7
• Bethel Island - 3.6
• Blackhawk - 3.6
• Brentwood - 3.6
• Byron - 3.6
• Camino Tassajara - 3.6
• Castle Hill - 3.6
• Clayton - 3.7
• Clyde - 3.7
• Concord - 3.7
• Contra Costa Centre - 3.7
• Crockett - 3.8
• Danville - 3.6
• Diablo - 3.6
• Discovery Bay - 3.8
• East Richmond Heights - 3.8
• El Cerrito - 3.8
• Hercules - 3.8
• Kensington - 3.8
• Knightsen - 3.6
• Lafayette - 3.7
• Martinez - 3.7
• Montalvin Manor - 3.8
• Moraga - 3.6
• Norris Canyon - 3.6
• North Gate - 3.7
• North Richmond - 3.8
• Oakley - 3.6
• Orinda - 3.8
• Pacheco - 3.7
• Pinole - 3.8
• Pittsburg - 3.7
• Pleasant Hill - 3.7
• Port Costa - 3.8
• Reliez Valley - 3.7
• Richmond - 3.8
• Rodeo - 3.8
• Rollingwood - 3.8
• San Miguel - 3.7
• San Pablo - 3.8
• San Ramon - 3.6
• Saranap - 3.7
• Shell Ridge - 3.7
• Tara Hills - 3.8
• Vine Hill - 3.7
• Walnut Creek - 3.7