San Antonio started Wednesday, April 15, 2026, wrapped in thick clouds and swampy humidity, with daybreak temperatures hovering near 73°F. By midafternoon, readings are expected to climb into the mid-80s, just in time for isolated to scattered thunderstorms to threaten the early- to mid-afternoon drive.
Afternoon Storm Chance
The National Weather Service Austin/San Antonio pegs the odds of showers and thunderstorms at about 30% between 1 p.m. and 4 p.m. on Wednesday, with a high near 85°F. South-southeast winds should run 5 to 10 mph, with gusts up to around 20 mph. Any storm that flares up could bring a quick burst of heavy rain and some gusty winds, but many neighborhoods may end up with nothing more than a brief shower.
Overnight And Thursday
Tonight stays on the warm and sticky side, with lows only dipping to around 70°F and a lingering chance of storms before 10 p.m. Thursday is forecast to heat up to near 90°F, with generally drier skies for much of the day. Local coverage notes that the storms that produced severe weather west of I-35 early Wednesday have been weakening as they track east, although scattered activity could redevelop later. See KSAT for details on the overnight trends.
Weekend Shift
A cold front is on track to roll in Saturday, April 18, bringing a healthier shot at widespread rain and a noticeable cool-down. Saturday’s high is expected to top out near 79°F, with about a 50% chance of showers and thunderstorms. By Saturday night, readings should slide into the 50s as northeast winds strengthen and gusts increase, so plan on a damp, cooler feel settling in for the weekend.
What To Know For The Commute
For today, it is a good idea to secure any loose patio furniture and keep an umbrella within reach for afternoon errands and evening plans. Brief heavy downpours could knock down visibility and make roads slick. Looking ahead to Saturday, if you have outdoor events, line up a dry backup option and check for forecast updates before you head out.
