
Yes, you can absolutely get a sunburn through a car window. While the windshield is laminated safety glass that blocks most of the sun's harmful ultraviolet (UV) rays, the side and rear windows are typically tempered glass, which offers significantly less protection. They filter out most UVB rays, the primary cause of sunburn, but allow a substantial amount of UVA rays to penetrate.
UVA rays are associated with skin aging and long-term damage, and they can indeed cause a sunburn with prolonged, direct exposure. This is a common issue for professional drivers or anyone who spends hours in a car regularly. The risk is higher for your left arm, neck, and face if you are the driver.
| UV Ray Type | Penetration Through Car Windows | Primary Skin Effect | Sunburn Risk |
|---|---|---|---|
| UVA | High (Up to 60-70% can pass through side windows) | Aging, Wrinkling, Long-term Damage | Yes, with prolonged exposure |
| UVB | Low (Mostly blocked by all auto glass) | Sunburn, Redness, Direct DNA Damage | Minimal |
| Windshield Protection | Blocks over 95% of both UVA and UVB | N/A | Very Low |
To protect yourself, especially on long drives, applying a broad-spectrum sunscreen (which protects against both UVA and UVB) to exposed skin is the most effective measure. You can also consider installing clear, professional-grade window tint film that offers high UV protection, which can block up to 99% of all UV radiation. Wearing long sleeves or sun-protective (UPF) clothing is another simple and reliable solution.

As a rideshare driver, my left arm was always more tan than my right. I didn't think much of it until I got a pretty nasty burn after a full day of driving in the summer. My dermatologist confirmed it was a sunburn. She said the window doesn't stop the aging rays. Now I keep sunscreen in my door pocket and use it every morning, just like I put on my seatbelt. It's part of the job.

Think of it like this: your car's windshield is like strong sunscreen, but the side windows are a weak, expired lotion. They stop the rays that cause the immediate red burn you feel, but they let in the deeper-penetrating rays that can still damage your skin over time. A quick trip to the store is fine, but if you're on a long road trip with the sun beating through the window for hours, you're definitely at risk. It's a slow, cumulative burn.

I was skeptical too, but the science checks out. I looked into it after a friend who is a trucker had a spot of sun damage on his window-side cheek. The key is the type of UV light. The glass stops UVB, which is what we typically associate with burning. But UVA, which causes tanning and aging, gets through. Enough UVA exposure will absolutely lead to erythema—the medical term for sunburn. It's an insidious risk because you don't feel it happening like you would at the .

My family learned this the hard way on our drive to Florida. Our son was in the backseat on the passenger side for the entire trip. By the time we arrived, his left arm and the side of his face were noticeably pink and tender. We were shocked because he was inside the car the whole time! The pediatrician said it's a common occurrence. We now make "car sunscreen" a mandatory part of our packing list for any long journey, and we apply it at the same rest stops where we get gas.


