Rain chances, cooler temps possible early next week

San Antonio residents are experiencing one of the hottest stretches on record as the final full week of summer pushes temperatures toward 100 degrees. While heat advisories remain in effect across much of the region, there is a glimmer of hope on the horizon. Early next week may bring a pattern shift that could deliver welcome rain and a modest cooling trend, though meteorologists stress that forecast confidence remains limited.

Forecast highlights

• RECORD HEAT: Near 100°, heat advisories in place.
• STEADILY HOT: Temps come down *some* but still hot this week.
• A CHANGE: We are cautiously optimistic for rain and cooler (really, not‑as‑hot) weather by early next week.

Current record heat and conditions

The thermometer hit 100° today, setting a new mark for the date. Heat indices are climbing into the 100‑103° range, prompting the National Weather Service to issue heat advisories along and east of Interstate‑35. Officials warn that prolonged exposure can lead to heat‑related illnesses, especially for vulnerable populations.

Steadily hot week ahead

Temps will dip slightly mid‑week but remain well above average. Above‑normal heat is expected to dominate through Thursday, when a modest 20% chance of showers or storms could offer brief relief. Even if rain does occur, it is unlikely to break the heat pattern entirely.

Potential for rain and cooler weather next week

By the weekend, a trough moving across the southern United States could usher in a more unsettled regime. Early indications point toward a shift in the overall pattern by Monday, bringing scattered rain showers and a small drop in daytime highs. While the models are not yet fully aligned, meteorologists say they are “cautiously optimistic” that the break will arrive.

What to expect by Monday

If the forecasted trough materializes, residents can anticipate increased cloud cover and intermittent rain beginning Sunday night, transitioning into Monday morning. Temperatures are projected to fall a few degrees, possibly into the low‑80s for highs, offering a modest but noticeable relief from the heat.

Model confidence and updates

Forecast models have begun to converge on a pattern change, but differences still exist regarding the exact timing and intensity of precipitation. KSAT meteorologists continue to monitor the evolving situation and will provide updates as the week progresses. The public is advised to check the latest forecasts before planning outdoor activities.

Meet the meteorologists

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 began after experiencing Hurricane Harvey in 2017.

Sarah Spivey is a San Antonio native who grew up watching KSAT. She has been a proud member of the KSAT Weather Authority Team since 2017.
A Clark High School and Texas A&M University graduate, she previously worked at KTEN News.
When not forecasting, Sarah enjoys hanging out with her husband and cat, and playing music.

Quick weather links and resources

• National Weather Service – San Antonio
• KSAT Weather Authority
• Texas Heat Outlook (PDF)
• Local emergency cooling centers map

Stay safe in the heat

Heat advisory tips (expand)

These simple steps can dramatically reduce the risk of heat exhaustion and heatstroke. If you experience dizziness, nausea, or a rapid heartbeat, move to a cooler place immediately and seek medical attention if symptoms persist.

KSAT meteorologists keep you on top of the ever‑changing South Texas weather.

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