UV index in San Antonio, TX today
The UV index in San Antonio, TX today is 6 (high). Sun protection is recommended from about 11am until about 4pm.
The EPA’s latest forecast for this ZIP code is dated Monday, October 26, 2026.
Hourly UV estimate
Estimated from the EPA daily peak and the sun’s position. Bars show the UV index at the top of each hour.
Sun times
What to do at UV 6
Cut back on time in the sun between 10 a.m. and 4 p.m. Cover up, use sunscreen, wear sunglasses and seek shade.
Questions
What is the UV index in San Antonio, TX today?
San Antonio, TX has a UV index of 6 (high) today, based on the EPA forecast for Monday, October 26, 2026.
When is the UV index highest in San Antonio, TX?
Around solar noon, which is about 1:17 PM local time today. The sun is highest then, so UV rays are strongest.
Do I need sunscreen today in San Antonio, TX?
Cut back on time in the sun between 10 a.m. and 4 p.m. Cover up, use sunscreen, wear sunglasses and seek shade. Sun protection is recommended from about 11am until about 4pm.
How is this UV index calculated?
The daily peak comes from the EPA UV Index forecast for ZIP code 78201. The hourly bars are an estimate that scales that peak by the sun’s height in the sky, so treat them as a guide rather than a measurement.
More UV index forecasts in TX
Source: U.S. EPA SunWise and the UV Index. Sunrise, sunset and hourly values are estimates by UV Warden. Last checked 2026-10-27. See the UV index scale.