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Austin Weather Forecast: Nearly 100 Degrees Through Tuesday

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Published on August 05, 2026
Austin Weather Forecast: Nearly 100 Degrees Through TuesdaySource: City of Austin

Austin is waking to mostly cloudy skies and muggy air Wednesday, with temperatures around 79 degrees before a sunny afternoon pushes near 99. The heat will be the main story for the capital city, and there is little meaningful relief in sight through next week.

The National Weather Service forecasts sunshine taking over Wednesday, with a high near 99 and heat index values reaching as high as 106. South winds should remain light at about 5 mph, while rain chances in Austin stay effectively at zero.

Little Relief After Sunset

Wednesday night will be mostly clear, but the low will only dip to around 78 degrees. Thursday brings another mostly sunny day near 99, with the heat index potentially climbing to 107 as humidity builds.

Hot And Mostly Dry Through Tuesday

The stubborn pattern continues Friday through Sunday, with highs near 98 each day and overnight lows around 77. Monday should reach about 97 degrees, followed by another 98-degree afternoon Tuesday, while rain chances remain between zero and 5% around Austin.

The forecast discussion leaves open a slight chance of showers or thunderstorms over the Coastal Plains Thursday and Friday afternoons, but says most locations will stay dry. In other words, Austin is looking at a mostly sunny stretch with very little help from the clouds.

Plan Around The Afternoon Heat

Residents who work or exercise outdoors should schedule demanding activities earlier or later in the day, take frequent shade breaks and drink water regularly. The city says Austin Public Library and Austin Parks facilities can serve as cooling centers during normal operating hours, while Travis County community centers are available from 8 a.m. to 5 p.m. weekdays; check the City of Austin for current locations and hours.

Austin-Weather & Environment