Forecast headlines for San Antonio (Copyright 2025 by KSAT - All rights reserved.)
FORECAST HIGHLIGHTS
OVERNIGHT STORMS: Possible near Rio Grande
HEAT INDEX 102°+: Humidity will push heat indices above 100° daily through Monday
FRONT TUESDAY: Lower humidity & temps by Wednesday
FORECAST
We’ve now experienced four days in a row of record heat, but some relief is on the way next week.
ISOLATED STORMS
Isolated storms can’t be ruled out, but any storms that happen to develop should significantly weaken before hitting San Antonio. There’s just an outside chance that San Antonio could get leftovers.
Rainfall chances overnight. (Copyright 2025 by KSAT - All rights reserved.)
TEMPERATURE & HUMIDITY
Plan for more of the same this weekend and to start next week. With afternoon temperatures well into the 90s combined with high humidity making it feel like 102-106°.
Closer to 90° for afternoon highs by the middle of next week (Copyright 2025 by KSAT - All rights reserved.)
A FRONT?!
Yes... but, know this time of year our cold fronts aren’t particularly strong. That said, we’ll enjoy some lower humidity and lower temperatures by Wednesday. Morning lows will return to the lower 60s, while afternoon highs return to near 90°.
7 Day forecast as of 5/17/25. (Copyright 2025 by KSAT - All rights reserved.)
Daily Forecast
KSAT meteorologists keep you on top of the ever-changing South Texas weather.
Shelby Ebertowski joined KSAT 12 News in January 2025. She came to San Antonio from Fargo, North Dakota via the University of North Dakota, where she learned the ropes as a weekend forecaster over two years at KVLY. Her love of weather love began after experiencing Hurricane Harvey in 2017.