UV across the country today
The strongest sun among the cities we track today is over El Paso, TX, where the index peaks near 9. 4 of the 40 cities reach 8 or higher — very high, which means unprotected skin can burn in under 20 minutes around midday. The index tracks the sun's angle, not the heat: it peaks within an hour of solar noon, runs higher at altitude and roughly doubles off snow or water.