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UV Index Scale Cheat Sheet by

UV Index Scale
index     sun     exposure     scale     healthcare     skin     uv

Introd­uction

The UV Index scale used in the United States conforms with intern­ational guidelines for UVI reporting establ­ished by the World Health Organi­zation. Learn how to read the UV index Scale to help you avoid harmful exposure to UV radiation.

0 - 2 Low

A UV Index reading of 0 to 2 means low danger from the sun's UV rays for the average person.

Wear sunglasses on bright days.
If you burn easily, cover up and use broad spectrum SPF 30+ sunscreen.
Watch out for bright surfaces, like sand, water and snow, which reflect UV and increase exposure.

3 to 5 Moderate

A UV Index reading of 3 to 5 means moderate risk of harm from unprot­ected sun exposure.

Stay in shade near midday when the sun is strongest.
If outdoors, wear protective clothing, a wide-b­rimmed hat, and UV-blo­cking sungla­sses.
Generously apply broad spectrum SPF 30+ sunscreen every 2 hours, even on cloudy days, and after swimming or sweating.
Watch out for bright surfaces, like sand, water and snow, which reflect UV and increase exposure.

6 to 7 High

A UV Index reading of 6 to 7 means high risk of harm from unprot­ected sun exposure. Protection against skin and eye damage is needed.

Reduce time in the sun between 10 a.m. and 4 p.m.
If outdoors, seek shade and wear protective clothing, a wide-b­rimmed hat, and UV-blo­cking sungla­sses.
Generously apply broad spectrum SPF 30+ sunscreen every 2 hours, even on cloudy days, and after swimming or sweating.
Watch out for bright surfaces, like sand, water and snow, which reflect UV and increase exposure.
 

UV Xcale

8 to 10 Very High

A UV Index reading of 8 to 10 means very high risk of harm from unprot­ected sun exposure. Take extra precau­tions because unprot­ected skin and eyes will be damaged and can burn quickly.

Minimize sun exposure between 10 a.m. and 4 p.m.
If outdoors, seek shade and wear protective clothing, a wide-b­rimmed hat, and UV-blo­cking sungla­sses.
Generously apply broad spectrum SPF 30+ sunscreen every 2 hours, even on cloudy days, and after swimming or sweating.
Watch out for bright surfaces, like sand, water and snow, which reflect UV and increase exposure.

11 or more Extreme

A UV Index reading of 11 or more means extreme risk of harm from unprot­ected sun exposure. Take all precau­tions because unprot­ected skin and eyes can burn in minutes.

Try to avoid sun exposure between 10 a.m. and 4 p.m.
If outdoors, seek shade and wear protective clothing, a wide-b­rimmed hat, and UV-blo­cking sungla­sses.
Generously apply broad spectrum SPF 30+ sunscreen every 2 hours, even on cloudy days, and after swimming or sweating.
Watch out for bright surfaces, like sand, water and snow, which reflect UV and increase exposure.

The Shadow Rule

An easy way to tell how much UV exposure you are getting is to look for your shadow:

If your shadow is taller than you are (in the early morning and late aftern­oon), your UV exposure is likely to be lower.
If your shadow is shorter than you are (around midday), you are being exposed to higher levels of UV radiation. Seek shade and protect your skin and eyes.

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