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

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As of 8:52 PM PDT on August 28, 2025, all 50 cities in Contra Costa County, CA in our database have a UV Index reading of 0, indicating no radiation from the sun.

Over the next 24 hours, the highest UV Index reading in Contra Costa County, CA is expected to be 8.1 in San Ramon between 1:00 PM - 2:00 PM PDT tomorrow.

Search Cities in Contra Costa County, CA

Current UV Index in Cities in Contra Costa County, CA

• Acalanes Ridge - 0
• Alamo - 0
• Alhambra Valley - 0
• Antioch - 0
• Bay Point - 0
• Bethel Island - 0
• Blackhawk - 0
• Brentwood - 0
• Byron - 0
• Camino Tassajara - 0
• Castle Hill - 0
• Clayton - 0
• Clyde - 0
• Concord - 0
• Contra Costa Centre - 0
• Crockett - 0
• Danville - 0
• Diablo - 0
• Discovery Bay - 0
• East Richmond Heights - 0
• El Cerrito - 0
• Hercules - 0
• Kensington - 0
• Knightsen - 0
• Lafayette - 0
• Martinez - 0
• Montalvin Manor - 0
• Moraga - 0
• Norris Canyon - 0
• North Gate - 0
• North Richmond - 0
• Oakley - 0
• Orinda - 0
• Pacheco - 0
• Pinole - 0
• Pittsburg - 0
• Pleasant Hill - 0
• Port Costa - 0
• Reliez Valley - 0
• Richmond - 0
• Rodeo - 0
• Rollingwood - 0
• San Miguel - 0
• San Pablo - 0
• San Ramon - 0
• Saranap - 0
• Shell Ridge - 0
• Tara Hills - 0
• Vine Hill - 0
• Walnut Creek - 0