San Antonio wakes up Sunday, May 24, 2026, to clear, muggy air, with early readings around 68°F and dewpoints in the mid 60s. Forecasters expect a mostly sunny day with a high near 87°F. East northeast winds should stay light around 5 mph, so the midday commute looks warm but otherwise calm.
Memorial Day Outlook
Monday, May 25, 2026 (Memorial Day) is expected to be sunnier and a touch warmer, with a high near 89°F and light east northeast breezes of 0 to 5 mph. It is shaping up to be a solid day for short outdoor plans and backyard barbecues. With humidity staying elevated, the heat will feel stickier than the thermometer suggests, so bring water, find shade where you can, and check on anyone who is especially vulnerable during the afternoon.
Storms Return Midweek
Rain chances climb on Tuesday, May 26, 2026, with a chance of afternoon showers and thunderstorms between about 1 p.m. and 4 p.m. The bigger concern arrives Tuesday night into Wednesday, May 27, 2026, when showers and thunderstorms are likely and the chance of precipitation jumps to roughly 90%. The National Weather Service notes some storms could produce locally heavy rain and slow moving downpours that lead to localized flooding and soggy commutes, so it is worth tracking watches and updates through Tuesday evening. See details from NWS Austin/San Antonio.
Plan Ahead
This update builds on our May 18 coverage and underscores the shift from a mostly dry holiday into a wetter midweek. See sweltering heat, wild winds, and midweek storms for background. If you have outdoor plans Tuesday night, consider moving them earlier or indoors, keep an eye on radar, and never drive through standing water, since low lying roads can flood quickly during slow moving storms.
