San Antonio starts Saturday with clear skies, humid air and temperatures near 79 degrees before sunrise. That brief early comfort will fade quickly, with afternoon highs expected to reach 97 and heat index values climbing as high as 104.
Hot, Mostly Dry Weekend Ahead
Saturday will be mostly sunny, with light south-southeast winds and only an 8% chance of rain, according to the National Weather Service. Tonight will stay mostly clear with a low near 77, while Sunday brings another sunny 97-degree afternoon and a heat index as high as 106.
Rain is a sideshow for San Antonio this weekend. A stray shower or thunderstorm is possible, especially closer to the Coastal Plains, and a few could drift toward the I-35 corridor, but the chance in the city remains low.
Triple-Digit Heat Arrives Midweek
Monday stays mostly sunny near 97 degrees before temperatures climb to 99 Tuesday, 100 Wednesday and 101 Thursday. Friday backs off slightly to around 99, but overnight lows remain stuck near 77 to 78, offering limited relief after sunset.
Winds will generally run 5 to 15 mph from the south or southeast, with gusts up to 25 mph possible Tuesday and Wednesday. Forecasters say some areas south of I-10 and east of I-37 could briefly reach Heat Advisory criteria as heat and humidity increase.
Early Starts Will Be The Smart Move
Outdoor chores, exercise and events will be more manageable early in the day, before the hottest temperatures arrive during the afternoon. The City of San Antonio recommends staying hydrated, taking breaks in air conditioning or shade, and checking on children, older adults and anyone working outside.
No active weather alerts are listed for the San Antonio area Saturday morning, but the week ahead is trending hotter and drier. With several days near or above 100 degrees, leaving people or pets in parked vehicles is especially dangerous.
