Hazy, muggy and stuck around 75°F before breakfast, Austin is stepping straight into summer mode. Dewpoints are already sticky, and by this afternoon the city is headed for a very warm high near 93°F with heat index values pushing toward 100°F. Most neighborhoods should stay dry, but a few isolated, potentially strong storms could bubble up later in the day.
Forecast Details
The National Weather Service in Austin/San Antonio is calling for a mostly cloudy, very warm Sunday, with south-southeast winds around 5 to 10 mph. High temperatures should land near 93°F, and it will feel closer to 100°F once you factor in the humidity. Forecasters keep rain chances on the low side, about 10 to 20 percent, with any isolated showers or strong storms most likely between 4 and 8 p.m. on Sunday, April 26, 2026.
The heat is not a one-day wonder. The National Weather Service notes that the warmth sticks around into the new week, with Tuesday, April 28, 2026, expected to climb toward 95°F. Winds could gust up to 20 mph, and heat index values may run even higher toward the western Hill Country. A weak cold front may slide in later in the week, which would bump up rain chances and take temperatures down a notch, but timing is still fuzzy, so locals are urged to keep checking updates from the National Weather Service.
Plan Ahead
With heat and humidity building, it is a good day to shift yard work, workouts or any heavy lifting outside to early morning or evening, and to keep water close at hand. Check in on older neighbors or anyone without air conditioning, since this kind of early-season heat can sneak up on people. If you need a place to cool off, the City of Austin keeps a list of cooling centers and heat resources online, though you will want to double-check hours before heading out. For outdoor plans tonight, bring plenty of water and have a backup plan in case a surprise storm drifts over your part of town, and never leave children or pets in parked vehicles, according to the City of Austin.
Evening Outlook
After sunset, clouds are expected to thicken with another warm, muggy night on tap and an overnight low near 72°F. Any showers that do form should stay on the light side, with new rainfall generally under a tenth of an inch where they occur. If you are heading to evening events or wrapping up the commute, plan for warm, sticky conditions and keep an eye on local forecasts in case one of those isolated thunderstorms decides to crash the party.
