San Antonio started Tuesday, May 12, 2026, on a bright note, with clear skies and a mild 65°F greeting early risers. Sunshine sticks around through the day, with a high near 87°F and light northeast breezes keeping things dry into the early evening.
Warm-Up Through The Week
Enjoy the relatively comfortable afternoons while they last. Temperatures are set to climb into the low 90s by midweek, with forecast highs near 91°F on Wednesday and around 93°F Thursday and beyond. An upper-level ridge will help keep most days dry, while humidity starts creeping back in late in the workweek.
As moisture returns, a brief uptick in showers and thunderstorms is possible late Sunday into Monday, according to the National Weather Service.
Heat Safety And Cooling Centers
With afternoons growing hotter and more humid, it is a good idea to schedule outdoor work and exercise for the morning hours and keep water and shade handy for kids and pets. The City of San Antonio keeps an updated list of cooling-center locations and heat-safety guidance. Residents can call 311 or check the city’s online resources for hours and sites.
If you or a neighbor does not have reliable air conditioning, consider spending the peak afternoon heat at a cooling center rather than trying to tough it out at home.
Timing And Travel
Today looks like a solid bet for outdoor plans, with mostly sunny skies, light winds, and an easy commute in both directions. By late Thursday into Friday, winds turn more southerly and may gust near 20 to 25 mph, so you may want to secure lightweight outdoor items before they start shifting around the yard.
Rain chances stay low through Saturday, but there is a slight chance of showers and storms Sunday night into Monday. If you are planning outdoor events to kick off next week, it is worth keeping an eye on updated forecasts.
