San Antonio will start the new workweek under a strong dose of September heat as temperatures climb into the mid-90s Monday. Road surfaces, including heavily traveled I-35, are expected to bake well above the air temperature, raising risks for overheating vehicles and heat-related illnesses during afternoon travel. Residents are urged to limit strenuous activity during peak heat hours and keep water on hand.
According to the National Weather Service in Austin/San Antonio, Monday will be sunny with a high near 94. Heat index values will push conditions to feel hotter, especially for outdoor workers, drivers, and children waiting for buses. Winds will remain light, offering little relief. Evening lows dip to around 72, but humidity will keep the air heavy overnight.
The hot and dry stretch will continue through midweek. Tuesday will bring another sunny day with highs near 94 before a brief chance of showers develops by Thursday. Even then, rain chances remain limited, with only a 20 percent chance of showers and thunderstorms expected Thursday afternoon and again Friday.
For those working outdoors or traveling the interstate system, officials recommend staying hydrated, checking tire pressure, and ensuring vehicles are properly cooled to prevent roadside emergencies. School districts and sports teams may need to adjust outdoor activities to avoid peak afternoon heat risks.
The heat streak shows little sign of breaking before the weekend. Nights will stay in the low 70s, keeping mornings warm and sticky.
Five Day Forecast for San Antonio, Texas
- Monday: Sunny, high near 94, low around 72.
- Tuesday: Sunny, high near 94, low around 72.
- Wednesday: Mostly sunny, high near 94, low near 73.
- Thursday: 20% chance of showers and storms after 1 p.m., high near 94, low near 73.
- Friday: 20% chance of showers and storms, high near 94, low around 73.
