By VOTP News STL Staff
September 20, 2026
ST. LOUIS — Sunday will remain hot across the St. Louis area, with a slight chance of showers during the morning and a slight chance of thunderstorms later in the day.
The National Weather Service forecast calls for a high near 89 degrees. Tonight is expected to be partly cloudy, with a low near 72.
Residents spending time outdoors should stay hydrated, take breaks from the heat and remain alert for changing weather during the afternoon.
Forecast information: National Weather Service St. Louis.
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