Weather Library

UV Index

Exposure
Category
Index Number
Sun Protection Messages
LOW
<2

You can safely enjoy being outside. Wear sunglasses on bright days. If you burn easily, cover up and use sunscreen SPF 15+.

In winter, reflection off snow can nearly double UV strength.

MODERATE
3-5

Take precautions if you will be outside, such as wearing a hat and sunglasses and using sunscreen SPF 15+. Reduce your exposure to the sun's most intense UV radiation by seeking shade during midday hours.

HIGH
6-7

Protection against sun damage is needed. Wear a wide-brimmed hat and sunglasses, use sunscreen SPF 15+ and wear a long-sleeved shirt and pants when practical. Reduce your exposure to the sun's most intense UV radiation by seeking shade during midday hours.

VERY HIGH
8-10

Protection against sun damage is needed. If you need to be outside during midday hours between 10 a.m. and 4 p.m., take steps to reduce sun exposure. A shirt, hat and sunscreen are a must, and be sure you seek shade.

Beachgoers should know that white sand and other bright surfaces reflect UV and can double UV exposure.

EXTREME
11+

Protection against sun damage is needed. If you need to be outside during midday hours between 10 a.m. and 4 p.m., take steps to reduce sun exposure. A shirt, hat and sunscreen are a must, and be sure you seek shade.

Beachgoers should know that white sand and other bright surfaces reflect UV and can double UV exposure.

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