From Brian Germ:
The last official day of summer will be yet another hot and humid day with highs in the mid 90s under a mix of sun and clouds. The heat index, or feels, like temperature, should exceed 100° again this afternoon for several hours. Breezy winds are expected to continue out of the south at 10 to 20 mph. Partly cloudy skies will prevail tonight with warm lows in the mid 70s.
Conditions are expected to remain fairly similar across Central Texas for the official start to Fall Friday and through the upcoming weekend. Expect partly to mostly clear skies, warm temperatures, and no rain. Highs should stay in the low to mid 90s with overnight lows in the low to mid 70s.
A drastic weather pattern change is expected to occur by the beginning and middle of next week. A strong trough in the western United States should strengthen and push into the Plains, bringing a cold front along with it. Rain and storm chances will be on the increase through next week as the front approaches and eventually pushes through Central Texas around Wednesday or Thursday. Temperatures are also expected to decrease in response to the added clouds, rain chances, and frontal passage.