UV Index Forecast


Sat Sun Mon Tue Wed Thu
UV Index UV Index UV Index UV Index UV Index UV Index
5.4 5.4 5.1 5.2 4.9 5.0
 Medium   Medium   Medium   Medium   Medium   Medium 

UV forecast courtesy of and Copyright © KNMI/ESA (http://www.temis.nl/). Used with permission.

UV Index Legend
UV Index Scale

US UV Forecast
SE UV Forecast SE Animated UV Forecast

What is the UV Index?

Some exposure to sunlight can be enjoyable; however, too much 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 an indicator of the expected risk of overexposure to the sun. The Index measures UV intensity levels on a scale of 1 to 11+, where low indicates a minimal risk of overexposure and 11+ means an extreme risk. The UV Index takes into account clouds and other local conditions that affect the amount of UV radiation reaching the ground.

By taking a few simple precautions, you can greatly reduce your risk of sun-related illnesses. To Be SunWise, consider the following steps:

While you should always take precautions against overexposure to the sun, please take special care to adopt the safeguards when the UV Index indicates levels of moderate or above.

Sources of data:

UV Index forecast from temis.nl
UV Index maps from WeatherUnderground
Actual UV index readings/graph data from UV sensor on Davis Vantage Pro Plus weather station

Thanks to Ken at Saratoga-Weather.org for the text for this page.