The Cold Truth(s) About Winter Sun Exposure

Snow Doubles UV Exposure: Snow and ice reflects 80% of UV rays, doubling your sun exposure during outdoor activities.  

Wind and Dry Air are Tough on Skin. Cold air, low humidity, and wind strip your skin of moisture, leading to dryness and increased sensitivity. In addition to using a moisturizing sunscreen, consider investing in a humidifier to help protect and restore your skin's barrier.

Ozone Layer is Thinnest in Winter: As temperatures drop, ozone production slows, causing our natural shield against harmful UV rays to become temporarily weaker.

Higher Altitudes Increase UV Exposure: The higher your elevation, the stronger the UV exposure—levels increase approximately 4–5% per 1,000 feet, raising your risk of sunburn and long-term skin damage.

Winter Weather Makes Sunscreen Wear Off Quickly: Harsh winter conditions—like wind, snow, sleet, and cold temperatures—can wear down sunscreen just as quickly as summer heat and swimming. Make sure to reapply sunscreen every 2 hours. 

Interested in a Sun Safety Training?

Outdoor workers are 60% more likely to develop skin cancer due to prolonged UV exposure, but it’s important to remember that skin cancer can affect everyone.

As part of our cancer prevention program, we offer tailored sun safety training presentations that cover skin cancer—including its types, causes, and warning signs—as well as practical strategies for staying protected.

If you’re interested in scheduling a sun safety training session or would like to receive educational materials, please contact our Program Coordinator, Ashley Pen, at apen@placer.ca.gov.