SESKStuff Everyone Should Know
SESK: Stuff Everyone Should Know · sesk.info/ski-uv-snow-reflect

Why can you sunburn under your chin on a snowy day?

Snow reflects UV light back at you from below.

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  1. Snow makes the sun hotter
  2. Snow reflects UV light up at you ✔
  3. Cold air lets more UV through

Why: Fresh snow bounces ultraviolet rays, so you get hit from above and below. Cover your skin and use sunscreen even when it is cold.

Huh, didn't know that: UV rays can also damage your eyes with short-term redness, dryness and a gritty feeling.

The dad joke
What's black, white and red all over? A zebra with a sunburn.
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References

Answer: Snow reflects UV light up at you. Fresh snow bounces ultraviolet rays, so you get hit from above and below. Cover your skin and use sunscreen even when it is cold.

  1. CDC NIOSH: Sun exposure and outdoor workers www.cdc.gov/niosh/outdoor-workers/about/sun-exposure.html
    Snow and light-colored sand reflect UV radiation, increasing the risk of sunburn.
    Checked 2026-10-10.

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