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

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As of 6:17 PM PDT on June 26, 2025, all 52 cities in San Bernardino County, CA in our database have a UV Index reading of Low. The city with the highest UV Index reading right now is Adelanto, CA with a reading of 1.2.

Over the next 24 hours, the highest UV Index reading in San Bernardino County, CA is expected to be 11.1 in Wrightwood between 1:00 PM - 2:00 PM PDT tomorrow.

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Current UV Index in Cities in San Bernardino County, CA

• Adelanto - 1.2
• Apple Valley - 1.1
• Baker - 0.9
• Barstow - 1.1
• Big Bear City - 1.1
• Big Bear Lake - 1.2
• Big River - 0.8
• Bloomington - 1.1
• Bluewater - 0.8
• Chino - 1.1
• Chino Hills - 1.1
• Colton - 1.1
• Crestline - 1.1
• Fontana - 1.1
• Fort Irwin - 1.1
• Grand Terrace - 1.1
• Hesperia - 1.1
• Highland - 1.1
• Homestead Valley - 1.1
• Joshua Tree - 1
• Lake Arrowhead - 1.1
• Lenwood - 1.1
• Loma Linda - 1.1
• Lucerne Valley - 1.1
• Lytle Creek - 1.2
• Mentone - 1.1
• Montclair - 1.1
• Morongo Valley - 1
• Mountain View Acres - 1.1
• Muscoy - 1.1
• Needles - 0.8
• Oak Glen - 1.1
• Oak Hills - 1.2
• Ontario - 1.1
• Phelan - 1.2
• Piñon Hills - 1.2
• Rancho Cucamonga - 1.1
• Redlands - 1.1
• Rialto - 1.1
• Running Springs - 1.2
• San Antonio Heights - 1.2
• San Bernardino - 1.1
• Searles Valley - 1.1
• Silver Lakes - 1.1
• Spring Valley Lake - 1.1
• Twentynine Palms - 0.9
• Upland - 1.1
• Victorville - 1.1
• Wrightwood - 1.2
• Yermo - 1.1
• Yucaipa - 1.1
• Yucca Valley - 1