From Sean Bellafiore:
Rain Sunday was scattered about the southern half of Central Texas and low-end rain chances will continue through the beginning of the upcoming work week. Overnight lows temperatures fall into the upper 60s and lower 70s with a low chance of a few showers. In addition to the low chance of showers, some patchy fog may also form across the area.
High temperatures remain below average Monday as afternoon temperatures climb into the upper 80s. With the amount of humidity in the atmosphere, heat index values will climb into the lower 90s. Scattered afternoon showers or weak thunderstorms will be scattered about Central Texas Monday afternoon with rain chances near 40%. Not all areas will see rain Monday, however rain can be locally heavy at times. Rain will wane in coverage and intensity after sunset.
Rain chances remain in the forecast Tuesday but will drop to 30%. There may be a few scattered showers during the morning, however the Gulf sea-breeze may also spark afternoon showers and thunderstorms east of I-35. Since rain chances Tuesday are a bit lower, temperatures will be a bit warmer with highs climbing back into the lower 90s under partly to mostly cloudy skies.
High temperatures remain in the lower 90s Wednesday but jump into the middle and upper 90s Thursday through the upcoming weekend. Heat index values will likely climb back into the triple-digits for the end of next week as high pressure builds over Texas. High pressure will remain in place potentially through the beginning of July keeping rain chances less than 10% (with only an isolated shower during the afternoon) while temperatures remain hot in the upper 90s.