KSAT Your Weather Authority is tracking a soggy start and a hot Mother’s Day for San Antonio, with morning fog and scattered showers giving way to a sunny, upper-80s to low-90s afternoon and storms likely after 6 pm. Meteorologists in San Antonio and Bexar County expect the main line of thunder to arrive after sunset, with the bulk of rain ending by around 2 am Monday. Read on for what to expect through the weekend and the safest ways to enjoy Mother’s Day plans.
Today begins with patches of fog and areas of mist across the region, trimming morning visibility for drivers and early risers. A few light, spotty showers are possible through mid-morning, but most neighborhoods will stay dry until later in the day. Afternoon heating raises the odds of a few isolated storms, roughly a 30 percent chance, while highs climb into the upper 80s with sticky humidity.
Mother’s Day daytime looks to be warm and mostly sunny, with highs pushing into the low 90s for much of San Antonio and nearby communities. That makes it a great afternoon for outdoor brunches and park time, but heat will be noticeable, so water and shade are practical must-haves. Expect the kind of weather that invites sunglasses and sunscreen, at least until the late-evening pattern shifts.
A frontal system is forecast to sweep in after sunset, and that’s when the weather turns more active and a little unruly. Storms are likely to develop after 6 pm, and some of those could pack strong winds and small hail — nothing widespread is guaranteed, but isolated severe cells are possible. Local forecasters will be watching storm tracks closely; if you have evening plans, have a backup indoor option and keep an eye on alerts.
Timing matters: the risk window for the heavier storms is mainly after dark, and most of the rainfall should wrap up by about 2 am Monday, leaving quieter, warmer weather for the start of next week. Once the showers clear out, expect a stretch of sunshine and milder humidity through much of the coming week. That makes early-week outdoor activities more comfortable after the weekend’s late showers move out.
If you’re organizing Mother’s Day events, plan for two scenarios — a hot, sunny afternoon or an interrupted evening when storms roll through. Keep a small emergency kit in your vehicle with water and a light blanket, secure any loose patio items, and be ready to move guests indoors quickly if thunderstorms approach. For families with outdoor reservations, call ahead to venues and follow local meteorologist updates from KSAT Your Weather Authority to time activities around the storm window.
Quick weather links to keep handy: WATCH LIVE: Doppler Radar, Hourly and 10-Day Forecast, Download FREE KSAT Weather Authority App for livestreams and local forecasts, and KSAT Connect to share photos. Those resources will provide real-time radar and push notifications when severe weather or strong gusts threaten plans, helping you adapt on the fly. Stay weather-aware and prioritize safety if storms begin after dark.
Enjoy the warm daytime conditions, but respect the late-evening storm threat — a sunny afternoon can flip to a noisy, windy night. Watching radar and staying flexible with evening plans is the best way to keep Mother’s Day pleasant and safe for everyone in San Antonio and Bexar County.
