As of 4:55 a.m. CDT Tuesday, June 9, 2026, San Antonio is cloudy, extremely muggy, and already feeling like a slow cooker at about 79°F, with a dew point near 75°F. Morning humidity is running high, and the low cloud deck is expected to break up into a warm, sticky afternoon where it will feel hotter than the thermometer suggests.
Afternoon Outlook
Skies should turn mostly sunny this afternoon with a high near 92°F and a slight chance of showers and thunderstorms after 1 p.m. Any storms that do pop up are expected to be isolated and mainly near the coastal plains. Southeast winds should blow around 5 to 10 mph with gusts up to 20 mph. Heat-index values could climb into the low 100s, according to the National Weather Service Austin/San Antonio.
Heat Safety And Cooling Options
With triple-digit heat-index values possible at times, it is a good idea to shift strenuous activity to early morning or evening and drink plenty of water. The City of San Antonio maintains a Places to Stay Cool map and guidance, and you can call 311 for locations and hours if you need an air-conditioned spot. Check on older neighbors, never leave children or pets in vehicles, and consider moving outdoor events to cooler hours.
What To Expect This Week
The National Weather Service notes a drier pattern late this week as a subtropical ridge suppresses widespread rain, but highs in the 90s will stick around and heat-index values could spike as high as 105-110°F in parts of the area by the weekend. Overnight lows are expected to stay a bit above normal, which will limit overnight relief, and Wednesday night may be breezier with gusts near 25 mph. Keep an eye on forecast updates if you have outdoor plans for the coming weekend.
