San Antonio, Texas, is bracing for triple-digit temperatures on Sunday, June 8, 2025. The highs are expected to reach around 101°F, with a heat index pushing up to 108°F. The National Weather Service has issued a warning for dangerous heat that could make outdoor activities risky.
What to Expect on Sunday
On Sunday, the temperature will climb to 101°F, but with the humidity, it will feel more like 108°F by the afternoon. South winds gusting up to 20 mph will provide little relief. Residents traveling along I-35 and other major roads are advised to avoid extended outdoor activities between noon and 6 p.m. to prevent heat-related illnesses.
Tips for Staying Safe in the Heat
To stay safe during the extreme heat:
- Drink plenty of water throughout the day.
- Avoid outdoor activities during the hottest hours from noon to 6 p.m.
- Check on elderly neighbors and ensure they have access to cool spaces.
- Never leave pets or children in a vehicle, even for a short time.
- If you must be outside, take frequent breaks in shaded or air-conditioned areas.
What’s Coming Next Week?
The heat will continue through Monday, with a high of 100°F, but isolated thunderstorms are possible late in the day. The chance of storms increases to 50% by Tuesday night. These showers could provide brief relief from the heat, but they may also bring gusty winds and localized flooding in some areas. The best chance for rain will be late Tuesday into Wednesday morning, where some areas might see significant rainfall.
San Antonio 5-Day Weather Forecast (June 7–12)
- Saturday, June 7: Mostly sunny, high 99°F, heat index near 107°F
- Sunday, June 8: High 101°F, heat index near 108°F, sunny and hot
- Monday, June 9: High 100°F, slight chance of storms at night
- Tuesday, June 10: High 96°F, 40% chance of showers, storms likely at night
- Wednesday, June 11: High 91°F, 60% chance of showers before 1 p.m.
- Thursday, June 12: High 90°F, 20% storm chance, warm and partly cloudy
San Antonio will face dangerous heat on Sunday, June 8, with temperatures reaching 101°F and a heat index of 108°F. Stay safe by following heat safety tips, avoiding outdoor activities during peak heat hours, and staying hydrated. The heat will continue into next week, but showers and storms could bring brief relief from the heat by Tuesday night.
