San Antonio woke up Wednesday, July 1, 2026, to mostly cloudy skies and temperatures in the upper 70s, and the cool start will not last long. Highs are expected to jump into the mid 90s this afternoon, and humidity will make it feel even hotter, with heat index readings near 102°F. Overnight will bring little relief, with lows around 75°F, so anyone without solid air conditioning is in for a sticky night. South southeast breezes of 5 to 10 mph will persist through the day, with stronger gusts possible tonight. If you have outdoor plans, it is smarter to schedule heavy activity for the early morning or evening and keep plenty of water on hand.
Afternoon Heat And What To Expect
According to the National Weather Service, highs on Wednesday, July 1, are forecast near 95°F, with heat index values climbing to about 102°F and south southeast winds of roughly 5 to 10 mph. Tonight will stay muggy, with lows near 75°F and southeast winds of 5 to 15 mph, along with gusts that could reach about 20 mph. That combination of heat and humidity means midday and late afternoon outdoor work is riskier than the thermometer alone might suggest. Take frequent breaks in the shade, drink water regularly, and watch for signs of heat exhaustion.
Holiday Outlook And Rain Chances
The heat sticks around through the Independence Day holiday. The forecast calls for a high near 96°F on Saturday, July 4, with temperatures holding in the mid 90s through next week. Rain chances remain low over the next few days, with forecasters only calling for a slight uptick in chances late this weekend into early next week, and nothing widespread at this point. For most July 4 plans, that means heat will be the main weather issue, not rain.
Stay Cool
The City of San Antonio is urging residents to use air conditioned spaces, check on vulnerable neighbors, and avoid heavy outdoor exertion during the peak heat window, typically from 2 to 7 p.m. City resources include an interactive list of cooling locations and additional safety tips, and residents can call 311 for help finding a nearby site. If someone shows signs of heat stroke, such as confusion, loss of consciousness, or a very high body temperature, call 911 right away.
