When should you use high beams in California? What to know when driving in fog
Fog has blanketed parts of California — including the Central Valley and northern regions — for more than two weeks, according to NASA.
This weather phenomenon, called tule fog, forms when moist marine air, light winds and clear skies combine, is common from November through February.
To ensure drivers reach their destinations safely, the California Vehicle Code has rules for driving in dangerous weather conditions.
What does state law say about driving in fog? Can you get a ticket for using your high beams?
Here’s what state law says about when you should use high beams in California:
When should you use high beams in California?
You should use high beams on highways or rural roads where visibility is low and traffic is minimal.
According to California Vehicle Code, high beams are allowed only when there are no oncoming vehicles within 500 feet.
You should turn on your headlights when it’s too dark to see from 1,000 feet away, according to the California Department of Motor Vehicles.
“Dim your high-beam headlights to low beams within 500 feet of a vehicle coming toward you or within 300 feet of a vehicle you are following,” the DMV said on its website.
Should I use my headlights while driving in fog?
According to the California Driver’s Handbook, you should use your headlights:
- When it is too dark to see from 1,000 feet away.
- 30 minutes after sunset and 30 minutes before sunrise.
- When dangerous weather conditions prevent you from seeing other vehicles.
- On mountain roads and tunnels, including on sunny days.
- When a road sign says that headlights must be on.
- To help other drivers see your vehicle.
“If you need to use your windshield wipers due to fog, rain or snow, you must turn on your low-beam headlights,” the DMV said.
Foggy conditions are hard to drive in and high beams can make driving more difficult, according to AAA.
“Use low beams if using windshield wipers due to rain, fog or snow,” the automobile association said on its website. “Use low beams if dust, clouds, smoke or fog affects visibility.”
Can you get a ticket for using your high beams?
According to Southern California law firm Shouse California Law Group, a driver can be cited for improper use of high beams.
The 2025 Judicial Council of California’s Uniform Bail and Penalty Schedule sets a base fine of $25 for this violation.
However, with additional penalty assessments and court fees, the total cost can exceed $200.
You can also get one point on your state driving record, Shouse California Law Group said.
In California, if a driver racks up a certain number of points on their record within one, two or three years, the DMV can label them a negligent operator and suspend or even revoke their license.
Points on a driver’s record are reported to their insurance company, which usually means higher rates, according to Progressive.
This story was originally published December 15, 2025 at 7:47 AM with the headline "When should you use high beams in California? What to know when driving in fog."
