San Antonio will have nice weather in September. Temperatures will rise from 87°F today to 94°F by next Saturday. Tonight will be clear with a low of 64°F and on Monday will be sunny with a high of 89°F and wind gusts up to 20 mph, as reported by National Weather Service.
Humidity will be at 67%, and warm weather will continue through Tuesday. There’s a 20% chance of showers and thunderstorms after 1 pm, with scattered thunderstorms possible in the evening. Nighttime temperatures will rise to 73°F. The barometric pressure is steady at 30.07 inches, and the Northeast wind will gust up to 20 mph through midweek.
On Wednesday, there's a 30% chance of rain, mainly after early afternoon. It will still be partly sunny with a high of around 89°F and northeast winds at 10 mph. The low for Wednesday night is expected to be around 72°F.
On Thursday, temperatures will rise to 92°F with a light northern breeze at 5 mph. The night will be calm with a low of around 73°F. Clear skies are expected through the week, but Friday night will be partly cloudy. Saturday has a 20% chance of showers and thunderstorms.
