Sun glare is one of the most common and underestimated driving hazards, and a few simple strategies can dramatically reduce your risk. Bright sunlight increases the chance of a life-threatening crash by 16%, accounting for roughly 1 in 20 serious daytime collisions. The good news: most glare problems come down to your windshield condition, your eyewear, and a few driving habits you can adjust today.
Why Sun Glare Is Worse in Fall and Winter
Sun glare happens when the sun sits at a low angle in the sky, putting it directly in your line of sight through the windshield. This is why the problem peaks during two specific windows: shortly after sunrise and before sunset, when you’re most likely commuting. But the season matters just as much as the time of day.
During fall and winter, the sun never climbs as high overhead as it does in summer. That lower arc means the sun spends more hours at the exact angle that blinds drivers. If you’ve noticed glare getting worse as the days shorten, that’s not your imagination. The sun’s position in the sky during a December commute can sit squarely behind your visor’s coverage for the entire drive, something that rarely happens in June.
Clean Your Windshield Inside and Out
A dirty windshield is the single biggest amplifier of sun glare. When light hits a film of grime, it scatters in every direction, turning a manageable bright spot into a wall of white. Most drivers clean the outside regularly but ignore the inside, where a hazy film builds up over time.
That interior haze comes from a few sources. Dashboard plastics and vinyl release gases when heated by the sun, and those gases deposit a thin, oily layer on the glass. Detailing sprays, air fresheners, and even touching the glass leave residue that compounds the problem. The film is nearly invisible under normal lighting but becomes obvious the moment sunlight hits it at a low angle.
To remove it, use isopropyl alcohol or a dedicated glass cleaner like Invisible Glass on a clean microfiber towel. Work in sections, wiping in one direction rather than circles. A melamine foam sponge (sold as Magic Eraser) can cut through stubborn buildup as a first pass, followed by glass cleaner for a streak-free finish. Some detailers follow up with a light coat of glass cleaner wax, which fills micro-imperfections and helps prevent fogging. Clean the inside of your windshield at least once a month, and more often if you park in direct sunlight.
Replace a Pitted Windshield
Over time, sand, road debris, and dust create tiny craters across your windshield’s surface. These pit marks are barely visible under normal conditions, but when sunlight or headlights strike the glass at certain angles, they refract and scatter light into bright spots that can momentarily blind you. When pitting is widespread, no amount of cleaning will fix the problem because the damage is in the glass itself. If your windshield looks fine from the passenger seat but turns into a dazzling mess when you drive toward the sun, pitting is likely the cause. Replacing the glass is the only real solution.
Wear Polarized Sunglasses
Standard tinted sunglasses reduce brightness overall, but polarized lenses target the specific type of light that causes road glare. When sunlight bounces off a flat surface like pavement, a car hood, or water on the road, it reflects in a single horizontal direction rather than scattering. That concentrated reflected light is what overwhelms your vision. Polarized lenses contain a chemical filter oriented to block horizontally reflected light while allowing other light through. The result is a dramatic reduction in glare and noticeably better depth perception.
Keep a pair in your car at all times. Prescription drivers can get polarized clip-ons or prescription polarized lenses. Look for lenses with a gray or brown tint for driving, as these preserve natural color perception better than yellow or amber options. One caveat: polarized lenses can make some LCD displays (like dashboard screens or toll booth readouts) harder to read at certain angles, but this is a minor trade-off for the visibility improvement.
Use Your Visor Strategically
Your car’s built-in sun visor is more versatile than most people realize. It swings down for a low sun ahead of you, but it also swings to the side to block glare coming through the driver’s window. Many drivers forget this second position entirely. Adjust it frequently as your direction of travel changes.
Standard visors leave a gap between the bottom edge and the top of the dashboard, and the sun often sits right in that gap during peak glare times. Aftermarket visor extenders attach to your existing visor and add a tinted, polarized panel that slides down to cover that blind spot. They typically cost under $20 and clip on without tools. A polarized extender is more useful than an opaque one because it dims the light without completely blocking your view of traffic signals and signs.
Adjust Your Driving Habits
When you’re driving into direct sunlight and visibility drops, the most important adjustment is increasing your following distance. Under normal conditions, a 2- to 3-second gap behind the car ahead is standard. In sun glare, extend that to at least 4 or 5 seconds. You may not be able to see brake lights clearly, and the extra space gives you more reaction time.
Slow down, even if traffic around you doesn’t. Glare can completely obscure pedestrians, cyclists, and stopped vehicles for several seconds at a time. If you’re on a multi-lane road, shifting to a lane where trees, buildings, or overpasses periodically block the sun can make a significant difference. On familiar commute routes, you may already know which stretches are worst. Planning an alternate route that runs north-south instead of east-west during sunrise or sunset can eliminate the problem entirely.
Turn On Your Headlights
This one protects you from other drivers dealing with the same glare. When the sun is low, oncoming drivers may struggle to see your vehicle. Turning on your headlights (not just daytime running lights) makes your car far more visible. Daytime running lights only illuminate the front and are dimmer than standard headlights. Critically, they don’t activate your taillights, which means drivers behind you in the same glare conditions can’t see you either. Manually switching to full headlights solves both problems.
Windshield Tint Strips
Most states allow a non-reflective tint strip along the top of your windshield, above what’s called the AS-1 line. This is a marking on the glass (usually about 5 to 6 inches from the top) that indicates where manufacturers permit tint. A quality tint strip in this zone acts like a permanent visor extension, cutting the intensity of a low sun before it reaches your eyes. It’s subtle enough to be legal in most jurisdictions, but check your state’s specific rules since regulations vary. A professional installation typically costs $50 to $100 and lasts the life of the windshield.
Dashboard and Dash Cover Considerations
Light-colored or shiny dashboards reflect sunlight upward onto the windshield, compounding glare from the outside. If your dashboard is reflective, a dark, matte-finish dash cover can reduce this secondary glare. At minimum, avoid placing reflective objects like phones, metallic cases, or glossy papers on the dashboard during sunny drives. Even a pair of sunglasses sitting lens-up on the dash can bounce light directly into your field of vision.