St. Louis/ Weather & Environment

Sun-Drenched Sunday Gives St. Louis a Breather Before Midweek Heat Roars Back

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Published on August 23, 2026
Sun-Drenched Sunday Gives St. Louis a Breather Before Midweek Heat Roars BackSource: Google Street View

St. Louis is waking up to a clear, comfortable Sunday before another mostly dry stretch settles over the city. Sunshine will dominate the day, with temperatures reaching the low 80s and a light northwest breeze keeping things pleasant by late-summer standards.

The high should reach about 82 degrees, with northwest winds between 3 and 8 mph and no rain expected. The National Weather Service St. Louis office has no watches or warnings posted for the area.

Cooler Overnight Before A Bright Monday

Sunday night turns partly cloudy, with temperatures falling to around 63 degrees and northeast winds staying light. Monday brings another sunny day and a high near 83, making it one of the better windows this week for outdoor plans, errands or a long-overdue patio appearance.

Warmth Builds Into Wednesday

Tuesday should remain mostly sunny with a high near 85, while Wednesday becomes the warmest day of the stretch at about 89 degrees. Rain chances remain low through Tuesday, but a slight chance of showers and thunderstorms arrives Wednesday night, mainly between 7 p.m. and 1 a.m.

Mostly Dry Finish With A Small Weekend Storm Chance

Thursday and Friday look sunny and a little cooler, with highs near 88 and 86 degrees, respectively. Saturday stays warm near 87 degrees, but a 20% chance of showers and thunderstorms could complicate some outdoor plans from morning into the afternoon and evening.