Austin is starting Saturday under mostly cloudy skies, with temperatures around 78 degrees and barely any wind. The gray morning will not last long: skies should turn mostly sunny as temperatures climb toward 98 degrees, with the heat index reaching about 102.
The National Weather Service expects light south-southeast winds, generally between 0 and 5 mph, and only a 10% chance of rain in Austin on Saturday. That means outdoor plans can proceed, but the afternoon will be a hot one with limited airflow.
Sunday Brings A Small Storm Chance And Bigger Heat
Sunday should again reach about 98 degrees, but humidity will push the heat index as high as 106. There is a 20% chance of showers and thunderstorms, mainly from late morning into the afternoon, though Austin and much of the I-35 corridor are expected to stay mostly dry.
Rain chances are higher toward the Coastal Plains and Southern Edwards Plateau, where isolated showers or storms could bring a brief downpour. Any rainfall near Austin would be more likely to provide a quick interruption than a widespread break from the heat.
Labor Day Starts A Triple-Digit Stretch
Labor Day is forecast to be mostly sunny with a high near 100 degrees and light south winds. Tuesday is also expected to reach 100, followed by highs near 99 Wednesday, 98 Thursday and 100 Friday.
Overnight lows will remain in the upper 70s through the week, offering only limited relief after sunset. With the hottest afternoons arriving under light winds, early-morning and evening plans will be more comfortable than midday activities.
Outdoor Plans May Need A Heat Strategy
Anyone spending time outside should plan frequent shade or air-conditioning breaks, drink water before feeling thirsty and avoid the hottest part of the afternoon when possible. Children, older adults, pets and people working outdoors will need extra attention as the heat builds.
No watches, warnings or advisories are currently in effect for the Austin area, but the combination of high temperatures and humidity can still make long stretches outdoors risky. Never leave children or pets in a parked vehicle, even for a short errand.
