>1-2: Low (minimal risk from UV rays for the average person)

Wear sunglasses on bright days.
In winter, snow can reflect UV rays and nearly double exposure.
Use SPF 15+ sunscreen if you burn easily.

>3-5: Moderate (moderate risk of harm from unprotected sun exposure)

Cover up, wear a hat and sunglasses.
Use SPF 15+ sunscreen.
Stay in the shade near midday when the sun is strongest.

>6-7: High (high risk of harm from unprotected sun exposure)

Seek shade during the midday hours.
Wear protective clothing, sunglasses, and SPF 15+ sunscreen.

>8-10: Very High (very high risk of harm; sun protection is essential)
Read more Weather

>11-12: Extreme (extreme risk of harm)

Try to avoid sun exposure from 10 a.m. to 4 p.m.
Reapply SPF 30+ sunscreen every 2 hours.
Seek shade, wear full coverage, and use sun protection.
>13+: Hellfire (You are already dead)

It's already too late.
You are dead.