10 Essential UV Risks to Be Aware of During Winter Months

When the temperature drops and snow begins to fall, it’s easy to forget that sun exposure is still a significant risk for your skin. Most people associate sunburns and UV damage with summer heat, but winter brings its own risks that are often overlooked. Here are ten lesser-known facts about skin cancer and UV exposure in winter that will help you protect your skin all year round.

1. Snow Doubles UV Exposure

Did you know snow reflects up to 80% of UV rays, doubling your sun exposure during outdoor activities? This is particularly dangerous for winter sports enthusiasts like skiers and snowboarders. Even when the temperatures are freezing, the sun’s reflection off the snow can cause damage to unprotected skin. 

2. Clouds Don’t Block UV Rays

While it might feel gloomy and cold under cloud cover, clouds are not effective at blocking UV rays. In fact, up to 80% of the sun’s harmful rays can penetrate through clouds. This means you’re still at risk for sun damage during overcast winter days. 

3. Higher Altitudes Increase UV Exposure

The higher you go, the more UV exposure you get. UV radiation levels increase by about 4-5% for every 1,000 feet of elevation. So, if you're hitting the slopes at a higher altitude, the thinner atmosphere allows more UV rays to reach your skin, putting you at a greater risk of sunburn and long-term damage.

4. Indoor UV Exposure Is a Thing

Think you're safe indoors? Think again. UVA rays can penetrate through glass windows, meaning even when you're indoors during the winter, you could be exposed to harmful rays. This applies especially when you spend time in your car or sit near large windows at home or work.

5. Winter Skin Is More Vulnerable

Cold, dry air can weaken your skin’s natural barrier, making it more vulnerable to UV damage. Cracked, dry skin is also more sensitive to the harmful effects of the sun’s rays, meaning it’s easier for UV exposure to cause damage—even if you're bundled up.

6. Clothing Doesn’t Guarantee UV Protection

Not all winter clothing protects against UV rays. Thin or loosely woven fabrics can still allow UV rays to penetrate your skin, especially when they become damp from snow or sweat. Be mindful of your clothing’s UV protection factor (UPF) when engaging in winter activities.

7. Skin Cancer Doesn't "Hibernate”

Many people think the risk of skin cancer goes away when summer ends, but that’s not the case. Skin cancer can develop any time of year, and winter is no exception. Even in colder months, regular skin checks are crucial to catch early signs of skin cancer.

8. Reflection Off Water and Ice Increases UV Exposure

Like snow, ice, and water reflect UV rays onto your skin. Whether near a frozen lake, shoveling ice off your driveway, or walking on icy streets, your skin is exposed to UV rays from multiple angles.

9. Vitamin D Without Risk

Many people believe they should skip sunscreen during winter to get enough Vitamin D. In reality, only brief sun exposure is needed for Vitamin D, and supplements or a Vitamin D-rich diet are safe alternatives that avoid the risk of skin cancer.

10. Your Lips Are at Risk, Too

Cold, dry air can crack your lips, making them more vulnerable to sun damage. Despite this, many people forget to apply sun protection to their lips, increasing their risk for lip cancer. Use a lip balm with SPF to stay protected all year long.

The common misconception that winter is a “safe” time to skip sunscreen or sun protection is inaccurate and dangerous. Remember, UV rays don’t take a break during winter, and your skin needs protection year-round. Whether hitting the slopes or running errands on a cloudy day, make sunscreen and skin care part of your daily routine.

References

1. Skin Cancer Foundation, "Winter Sun Protection."(https://www.skincancer.org)

2. American Academy of Dermatology, "Sun Protection for Winter." (https://www.aad.org)

3. World Health Organization, "Sun Protection and UV Exposure." (https://www.who.int)

4. Cleveland Clinic, "Dry Skin and UV Damage."(https://www.clevelandclinic.org)

5. American Cancer Society, "Skin Cancer Awareness." (https://www.cancer.org)

6. Harvard Health, "Vitamin D and Sun Protection." (https://www.health.harvard.edu)