San Antonio rolled into Sunday morning, June 28, 2026, under mostly cloudy, sticky skies, with temperatures already in the upper 70s. The warm start will not last long. Thermometers are expected to surge to around 95°F this afternoon, with the heat index making it feel more like the low 100s. South-southeast breezes will strengthen later in the day, so it may feel even hotter than what the numbers suggest.
Afternoon Heat And Gusts
The roughest stretch looks to be from about 2 to 6 p.m., when highs rise into the mid 90s and heat index values could push between 100 and 107°F in some neighborhoods. Southerly winds of 10 to 15 mph may kick up gusts in the 20 to 30 mph range, enough to jostle lightweight tents and stir up dust. According to the NWS Austin/San Antonio forecast discussion, high pressure will keep the region dry and the heat elevated into early July, so outdoor work is best saved for the cooler morning or evening hours.
Local Resources And Cooling Sites
For anyone who needs a break from the heat, the City of San Antonio operates libraries, community centers, and senior centers that can extend hours during hot spells. An interactive map and more detailed guidance are available from the city. Per the City of San Antonio, residents should call 311 for the latest information on cooling-site hours and are urged to check in on older adults, young children, pets, and anyone working outside.
Quick Outlook And Context
Forecasters say a plume of Saharan dust may drift over the region on Monday, likely to create hazy, milky skies and add an orange tint to sunrises and sunsets, but it will not noticeably cool things down. This sort of early-season heat is not entirely new for the area. For a look back at a similar stretch in April, see our earlier coverage of San Antonio’s steamy sauna weather for context.
