From Rusty Garrett:
Although the autumnal equinox (signaling the start of Fall) is just a few days away, it will continue to feel like Summer in Central Texas for the next few days.
Overnight temperatures return to the low/mid 70s. Skies will remain mostly sunny on Wednesday with highs in the low/mid 90s. Heat index values will once again climb to near 100°. In anticipation of a few more clouds overhead (and a 20% chance of rain), Thursday's highs will be a bit milder in the upper 80s and low 90s.
Our upcoming rain chances come from an approaching low moving from northern Mexico into western Texas. On Friday, the area of low pressure to our west will creep a little closer to Central Texas and scattered rain and thunderstorms may develop during the afternoon. Rain chances Friday are near 50% and rain may be locally heavy at times, but severe weather is not anticipated. Highs, thanks to the higher rain chances, will only climb into the middle and upper 80s.
Unfortunately, confidence in the forecast Saturday and Sunday isn't too high because of how the upper-level low and a stalled front to our north may interact. Although the front is expected to stay well away from Central Texas, the low may give it enough forward momentum to move into Central Texas, providing us with high afternoon rain chances.
Rain odds Saturday are near 50% but will stay near 30% Sunday since the front isn't likely to make it all the way through the area. Despite the front moving close to Central Texas, temperatures will still likely remain above normal in the mid and upper 80s.