UV Index Today
Real-time solar radiation monitoring
Blog
Heat and UV news with a practical angle. For FAQ-style answers, see the Guide.
Aug 7, 2026
UV Still Hits You Underwater
Clear pool and ocean water pass a large share of UV to shallow depths. Cool water hides the burn—treat a swim like open-sky time, not shelter.
Aug 5, 2026
Higher Elevation Means Stronger UV—Even When the Air Feels Cool
UV rises with altitude as the atmosphere thins. Cool mountain air is not a low-UV signal—use elevation, snow, and today’s peak when you plan a hike or ski day.
Aug 3, 2026
UV Peaks Before the Day Feels Hottest
Solar noon drives the day’s highest UV. Air temperature often peaks hours later—so a cool late morning can still sit under a High or Extreme index.
Jul 31, 2026
Shade Cuts Direct Sun. It Does Not Cancel UV.
Why beach umbrellas, tree cover, and patio shade still leave you exposed—and how reflection from sand, water, and snow changes the dose.
Jul 30, 2026
Phoenix Faces 116°F This Weekend as Heat Dome Hits the Desert Southwest
Breaking weather update for July 31–August 2, 2026—Phoenix may tie 116°F records under an Extreme Heat Warning, while South Florida forecasts Extreme UV near 12.