Today's UV outlook for San Luis
Today's forecast for San Luis peaks at UV 6.2 around 14:00. The hourly outlook shows 7 hours at moderate or above (UV 3+), 1 hour at high or above (UV 6+). The live reading is UV 0.0 right now.
San Luis sits at about 693 m elevation. Thinner air at altitude can add roughly 7% UV compared with sea level at the same latitude—cool mountain air is not a low-UV signal.
Peak UV reaches the high band today. Plan longer outdoor sessions earlier or later if you can, and use the calculator below to see how long unprotected skin may last at the current reading.
Compare with other cities in San Luis, or read practical planning notes in the blog .