San Antonio woke Tuesday, April 28, 2026, to hazy, humid air and upper-70s temperatures that felt more like midsummer than spring. By this afternoon, the mercury is expected to climb to near 94F, with heat-index values pushing into the triple digits, roughly 100 to 105F in most neighborhoods. South-southeast winds will run light to moderate with gusts near 20 mph, which means any outdoor plans are likely to feel sticky, sluggish, and a little punishing.
Afternoon Heat and Humidity
Mostly cloudy skies are expected to hang around through the afternoon, with only a slim chance of an isolated shower and very little rain if anything does pop up. The forecast calls for a high near 94F, with heat-index values up to about 105F. The National Weather Service advises residents to limit prolonged outdoor exertion during the hottest hours of the day.
Wednesday Into The Weekend
A cold front is set to push into the region on Wednesday, bringing scattered showers and a better shot at thunderstorms mainly after 1 p.m. Highs should ease back a bit, topping out near 89F. The strongest signal for heavier rain shows up Thursday night into Friday, when guidance points to an increased chance for locally an inch or more of rain and gusty north winds. Behind the front, temperatures will take a noticeable dip, with highs near 70F on Saturday and morning lows sliding into the 40s in some spots. Any storms late this week could bring brief heavy downpours, gusty winds, and small hail, so keep an eye on forecast updates if you have travel or outdoor plans.
Where To Cool Off
If the heat is working your AC too hard or wrecking your outdoor plans, the City of San Antonio maintains a list of community cooling sites, including libraries, community centers, and senior centers that may extend hours during hot spells. Check operating hours before you head out, bring plenty of water, and consider checking in on neighbors who might be more vulnerable to the heat.
