UltraViolet (UV) Index

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What is the UV Index?


Time spent playing in the sunlight can be enjoyable; however, too much radiation exposure could be dangerous. Overexposure to the sun's ultraviolet (UV) radiation can cause immediate effects, such as sunburn and long-term problems such as skin cancer and cataracts. The UV Index, which was developed by the National Weather Service and the U.S. Environmental Protection Agency (EPA), provides important information to help you plan your outdoor activities to prevent overexposure to the sun’s rays.

The UV Index provides a daily forecast of the (estimated) expected risk of overexposure to the sun. The Index predicts UV intensity levels on a scale of 1 to 11+, where low indicates a minimal risk of overexposure and 11+ means an extreme risk. Calculated on a next-day basis for every U.S. ZIP code, the UV Index takes into account clouds and other local conditions that affect the amount of UV radiation reaching the ground in different parts of the country.

By taking several, simple precautions, you can greatly reduce your risk of sun-related illnesses. To be "Be SunWise!", consider the following steps:
  • Watch for the UV Index daily.
  • Avoid sunlamps and tanning salons.
  • Learn what SPF sunscreen is right for you.
  • Limit your time in the sun between 10am and 4pm
  • Whenever possible, seek shade.
  • Use a broad spectrum sunscreen with an SPF suitable for your skin type and planned time in the sun.
  • Wear a wide-brimmed hat and if possible, tightly woven, full-length clothing.
  • Wear UV-protective sunglasses.
 UV Index
While outside, you should always take precautions against overexposure to the sun's radiation. Learn to take special care by adopting the suggested safeguards for predicted levels of the UV Index. Watch for UV Index reports in your local newspapers and on tv; remember to "Be SunWise!". For more information, or to check your local forecast, visit the EPA website.

Today's Daily UV Index for Lyman.

For the Daily UV Index of a different Zip Code.
UV Index Number Exposure Level Sun Protection Messages
0 - 2 Low Wear sunglasses on bright days. In winter, reflection off snow can nearly double UV strength. If you burn easily, cover up and use sunscreen.
3 - 5 Moderate Take precautions, such as covering up and using sunscreen, if you will be outside. Stay in shade near midday when the sun is strongest.
6 - 8 High Protection against sunburn is needed. Reduce time in the sun between 10 am and 4pm. Cover up, wear a hat, sunglasses and use sunscreen.
8 - 10 Very High Take extra precautions. Unprotected skin will be damaged and can burn quickly. Try to avoid the sun between 10 am and 4pm. Otherwise, seek shade, cover up, wear a hat and sunglasses, and use sunscreen.
11+ Extreme Take all precautions. Unprotected skin can burn in minutes. Beachgoers should know that white sand and other bright surfaces reflect UV and will increase UV exposure. Avoid the sun between 10 am and 4pm. Seek shade, cover up, wear a hat and sunglasses, and use sunscreen.




Home FAQ Association Boating Laws Community Contests Current Events Discussions Fishing
Links Living Local Laws Maps Marine Safety Past Events Photos State of Maine Water Education
E-mail: Contact the webmaster with your questions, comments or suggestions.

UltraViolet (UV) Index