True or False? You Don’t Need to Use Sunscreen in Winter


Without question, the answer is false! Sunscreen must be worn 365 days a year–even in winter. Let me explain why.

There are two types of UV rays given off from the sun that you need to know about.

UVA rays:

-responsible for changing the DNA in the skin causing premature skin aging and skin cancer

-approximate same strength from summer to winter

-full strength from sun up to sun down

-strong from pole-to-pole

-strong at any altitude

-penetrates through clouds (which is why sunscreen should be called daylight screen!)

-penetrates glass through windows in your home, office or car…

UVB Rays:

-responsible for giving the skin a suntan or sunburn

-strongest from 10:00 am – 4:00 pm and less strong in the winter

-rays are strongest at equator

-strongest at high altitudes (which is why it’s easier to get a sunburn while skiing in high altitude locations such as Colorado)

-does not penetrate glass

What does all this mean?

The wrinkle-causing rays you get from daylight (UVA rays) are equally strong from summer to winter and can penetrate through windows in your car, home or office so you must wear sunscreen in the winter.

Be sure to look for formulas that offer both UVA/UVB protection so you’re sure to block out both harmful rays. Our Daily Protection SPF 30 is one of our best-selling products!

Read: Does Wearing Sunscreen Cause Vitamin D Deficiencies?

Read: If You Break Out from Sunscreens, Use One With Zinc Oxide

Read: Does SPF 30 Protect Your Skin Twice as Much as SPF 15?

Which products are right for your skin? See our nine skin types and get products recommended.

Need expert advice from a licensed esthetician? Schedule My Skin Prescription to get personalized advice in person, over the phone or via Skype or Facetime.

For more expert skin advice, check out Skin Source–the A-Z guide on all things skin. Also sign up for our skin tip e-newsletter, follow Renée Rouleau on Twitter and join the discussion on our Facebook page. You’ll be your own skin care expert in no time!

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Content found on Blog.ReneeRouleau.com, including: text, images, audio, or other formats were created for informational purposes only. The Content is not intended to be a substitute for professional medical advice, diagnosis, or treatment. Always seek the advice of your physician or other qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read on this blog.