Today's UV outlook for San José
Today's forecast for San José peaks at UV 9.3 around 12:00. The hourly outlook shows 9 hours at moderate or above (UV 3+), 4 hours at high or above (UV 6+), 2 hours at very high or above (UV 8+). The live reading is UV 9.0 right now.
San José sits at about 1130 m elevation. Thinner air at altitude can add roughly 11% UV compared with sea level at the same latitude—cool mountain air is not a low-UV signal.
With today's peak in the very high range, unprotected skin can burn quickly around 12:00. Use the burn-time estimate below for your skin type, and prefer shade or SPF 30+ for outdoor time between late morning and mid-afternoon.
Compare with other cities in San José, or read practical planning notes in the blog .