San Bernardino County, CA: Current UV Index and Hourly Forecast

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As of 12:55 PM PDT on October 2, 2025, out of 52 cities in San Bernardino County, CA in our database, 33 cities (63%) have a UV Index reading of High, while 19 cities (37%) have a UV Index reading of Very High. The city with the highest UV Index reading right now is Big Bear City, CA with a reading of 8.1.

Over the next 24 hours, the highest UV Index reading in San Bernardino County, CA is expected to be 8.5 in Big Bear City between 1:00 PM - 2:00 PM PDT today.

Search Cities in San Bernardino County, CA

Current UV Index in Cities in San Bernardino County, CA

• Adelanto - 7.3
• Apple Valley - 7.3
• Baker - 7.2
• Barstow - 7.3
• Big Bear City - 8.1
• Big Bear Lake - 7.9
• Big River - 7.5
• Bloomington - 7
• Bluewater - 7.5
• Chino - 7
• Chino Hills - 7
• Colton - 7.2
• Crestline - 7.5
• Fontana - 7
• Fort Irwin - 7.2
• Grand Terrace - 7.2
• Hesperia - 7.3
• Highland - 7.2
• Homestead Valley - 7.7
• Joshua Tree - 7.7
• Lake Arrowhead - 7.5
• Lenwood - 7.1
• Loma Linda - 7.2
• Lucerne Valley - 7.4
• Lytle Creek - 7.5
• Mentone - 7.5
• Montclair - 7
• Morongo Valley - 7.5
• Mountain View Acres - 7.3
• Muscoy - 7.5
• Needles - 7.3
• Oak Glen - 7.5
• Oak Hills - 7.3
• Ontario - 7
• Phelan - 7.3
• Piñon Hills - 7.3
• Rancho Cucamonga - 7
• Redlands - 7.2
• Rialto - 7
• Running Springs - 7.9
• San Antonio Heights - 7.5
• San Bernardino - 7.5
• Searles Valley - 6.8
• Silver Lakes - 7.2
• Spring Valley Lake - 7.3
• Twentynine Palms - 7.4
• Upland - 7
• Victorville - 7.3
• Wrightwood - 7.5
• Yermo - 7.1
• Yucaipa - 7.5
• Yucca Valley - 7.5