Weather forecasts usually include a UV index, a measure of the intensity of ultraviolet radiation from the sun. The higher the number, the greater the risk to people. Most of the radiation that ...

The National Weather Service has issued Heat Advisories and Extreme Heat Watches throughout many parts of Illinois this weekend, warning of dangerously hot conditions and heat indexes over 100. Going ...

Most of us check the temperature every morning before we head outside, but there’s another number on your weather app that’s just as important: the UV Index. The UV Index tells us how strong the sun’s ...

SIOUX FALLS, S.D. (KELO) — With summer right around the corner, we’ll be keeping an eye on the skies for more reasons than one. Meteorologist Adam Rutt explains. The last couple of days in KELOLAND ...

It probably isn't a surprise to learn that Colorado's high elevation impacts how early in the year a high UV index becomes an issue for ...

We’re rapidly gaining daylength in Colorado... and we’ll get plenty of it with high pressure in place this week. With that gain, we’re also seeing jumps in our peak UV index, which is now peaking ...

What April's sun angle means for you Step outside on a sunny April afternoon in Indianapolis and something might surprise you — it is warm! Really warm, considering it was not that long ago we were ...

The summer sun is returning to Phoenix in full force, and with it comes an invisible hazard that can be just as potent as the heat: ultraviolet radiation. As triple-digit temperatures dominate the ...