San Antonio, TX – A sweltering Monday is ahead for San Antonio, with the National Weather Service warning of a heat index reaching up to 102°F and a chance of afternoon thunderstorms. The highest storm risk arrives between 4 p.m. and 7 p.m., potentially bringing brief downpours, lightning, and gusty winds to parts of Bexar County.
According to the National Weather Service, skies will be sunny for much of the day, but a slight chance of showers begins after 1 p.m., increasing into the late afternoon. South and southeast winds will remain light, shifting eastward toward evening. Heat and humidity will remain high enough to make prolonged outdoor activity risky without precautions.
While Monday’s storm risk is relatively low—only about 20%—any storms that develop could be intense in isolated spots. Outdoor workers and event planners should stay weather-aware, especially for lightning hazards. Those sensitive to heat should limit time outside, stay hydrated, and use cooling breaks.
This pattern of hot days with low storm chances is expected to continue into midweek, with Tuesday bringing another round of afternoon thunderstorm potential. Heat warnings remain possible if temperatures or humidity levels rise further.
Five Day San Antonio, TX Forecast:
- Sunday Night: Mostly clear. Low 76°F.
- Monday: Slight chance of afternoon thunderstorms after 1 p.m. High 97°F, low 77°F.
- Tuesday: 20% chance of afternoon storms. High 98°F, low 77°F.
- Wednesday: 20% chance of afternoon storms. High 98°F, low 77°F.
- Thursday: Sunny and hot. High 99°F, low 78°F.
