When summer ends, it’s easy to put sunscreen away with your sandals and beach towels. The days are shorter, the temperatures are cooler, and you may not feel like you’re getting nearly as much sun. Which brings us to the important question: do you need sunscreen in winter?
Yes. While your risk of sunburn may be lower during some fall and winter days, ultraviolet (UV) radiation doesn’t disappear when temperatures drop. Daily sun exposure can still contribute to premature skin aging and cumulative skin damage, making year-round sun protection an important part of a healthy skincare routine.
UVA vs. UVB: What’s the Difference?
Not all UV radiation affects your skin in the same way.
Here’s what you need to know about UVA and UVB:
- UVB Rays: UVB rays are the ones primarily responsible for sunburn. Their intensity varies by season, time of day, location, and other factors. UVB exposure is generally lower during the winter months, particularly in areas farther from the equator.
- UVA Rays: UVA rays, however, are more consistently present throughout the year. They penetrate deeper into the skin and contribute to premature aging, including wrinkles, fine lines, and changes in pigmentation. UVA exposure also plays a role in skin cancer.
That distinction is one reason why asking, “Is sunscreen necessary in winter?” is a little more complicated than simply asking whether you’re likely to get sunburned. Even when UVB exposure is relatively low, UVA exposure can continue.
For everyday protection, opt for a broad-spectrum sunscreen (chemical or mineral) that protects against both UVA and UVB rays. We recommend the Alastin HydraTint Pro Mineral Broad Spectrum Sunscreen with SPF 36.
Do You Need Sunscreen on Cloudy Days?
If you’ve ever thought you don’t need sunscreen because it’s cloudy, you’re not alone.
But clouds don’t block all UV radiation. Some UV rays can still reach your skin on overcast days, so sunscreen on cloudy days is still important.
The same principle applies during fall and winter. A gray, chilly day may not feel like a typical sun exposure day, but your skin can still be exposed to UV radiation when you spend time outside. Snow can also reflect UV radiation, increasing exposure in winter environments. This is particularly relevant if you’re skiing, snowboarding, hiking, or spending extended periods outdoors.
What About Sunscreen and Windows?
You might also assume you’re protected from the sun because you spend most of the day indoors.
That depends on the type of UV radiation involved. Standard glass blocks most UVB rays, but UVA can pass through many types of glass. So, if you regularly sit near a sunny window, drive for long periods, or work in a space with significant sun exposure, your skin may still receive UVA exposure.
You don’t necessarily need to panic about every ray of sunlight coming through your windows. Instead, think about sun protection as part of your overall daily routine, particularly when you’ll be exposed to sunlight for extended periods.
Cumulative Sun Damage Adds Up
One reason to think beyond sunburn is that UV damage is cumulative.
You may not notice the effects of a few minutes of sun exposure here and there. But repeated sun exposure over months and years can lead to premature aging and a higher risk of skin cancer. That means sun protection shouldn’t only be something you reach for before a beach vacation.
Making sunscreen a year-round habit can help reduce the amount of cumulative UV exposure your skin receives. And because fall and winter often involve everyday activities like driving, walking, running errands, or sitting outside on a crisp afternoon, those exposures can add up.
Does Sunscreen Block Vitamin D?
Because your skin can produce vitamin D when exposed to UVB radiation, it’s reasonable to wonder whether regularly using sunscreen could interfere with vitamin D levels.
Research suggests that sunscreen use does not necessarily lead to vitamin D deficiency in real-world conditions. In addition, vitamin D can come from food and supplements, and your healthcare provider can help determine whether you need to monitor or supplement your levels.
You shouldn’t intentionally skip sunscreen or expose your skin to unprotected UV radiation to get vitamin D.
Is Sunscreen Bad for You?
Like any skincare product, sunscreen ingredients can cause irritation or allergic reactions in some people. If a particular sunscreen doesn’t agree with your skin, you can try a different formulation or discuss alternatives with a dermatologist.
But avoiding sunscreen altogether because of generalized concerns about sunscreen safety can leave your skin without an important form of UV protection.
If you’re concerned about specific ingredients, talk with a dermatologist or skincare expert about choosing a sunscreen that fits your skin type, sensitivities, and preferences.
So, Is Sunscreen Necessary in Winter?
Do you need sunscreen in winter? Yes! Winter doesn’t eliminate UV exposure, and cloudy skies and cooler temperatures don’t mean your skin is completely protected. A sunscreen with at least SPF 30, combined with habits like seeking shade and wearing protective clothing, can protect your skin year-round.
If you already have sun damage on your face that you’d like to treat, visit us at Cult Aesthetics. We offer an array of skincare treatments to deliver a fresh, youthful glow.
Book a consultation today to learn which service is right for you.