San Antonio woke up warm, clear, and sticky Sunday, with early lows near 72°F and an afternoon high expected around 92°F on May 10, 2026. It looks like a classic muggy May day, but the quiet is temporary. Late tonight into Monday morning, a fast-moving line of storms is expected to barrel across the region and could turn severe after dark.
What To Expect
From late Sunday night into early Monday (May 10–11, 2026), forecasters are calling for a line of strong to potentially severe thunderstorms to sweep through the area. According to the National Weather Service Austin/San Antonio, the main concerns are damaging straight-line winds that could top 75 mph, large hail, and pockets of very heavy rain. Totals of 2 to 4 inches are likely in some spots, with isolated amounts of 5 to 6 inches possible if the front slows down.
Timing And Commute Impacts
The cold front is expected to push through the southern Edwards Plateau and Hill Country roughly between 7:00 p.m. and 11:00 p.m. on Sunday, May 10. It should then move into the I-35 corridor between about 11:00 p.m. and midnight and reach the Coastal Plains after midnight into the early hours of Monday, May 11.
Sudden downpours, frequent lightning, and strong wind gusts could make driving tricky, especially overnight. San Antonio International Airport and late-night flights may face delays or even cancellations if storms move through at peak intensity.
Prepare Tonight
Before storms arrive, secure loose patio furniture and other outdoor items, bring pets and grills inside, and avoid driving through any standing water that develops. For local shelter options and emergency-weather resources, call 3-1-1 or check the City of San Antonio emergency weather page for guidance and contact information. Keep phones fully charged, have a flashlight ready, and keep an eye on local alerts through the night.
Monday And The Week Ahead
Showers and storms should gradually wind down Monday morning, with clearing skies expected by Monday afternoon and a cooler high in the mid 80s, around 84°F, on Monday, May 11. After that, a drier and seasonably warm pattern returns for much of the week, with highs climbing back into the upper 80s and low 90s by Thursday and Friday.
