St. Louis/ Weather & Environment

From Fog to Flip-Flops: St. Louis Basks in 77-Degree Thursday Ahead of Warm Weekend

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Published on October 22, 2026
From Fog to Flip-Flops: St. Louis Basks in 77-Degree Thursday Ahead of Warm WeekendSt. Louis Skyline Viewpoint — Weather Coverage Scenic Backdrop
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St. Louis is waking Thursday to clear skies, calm air and temperatures near 50 degrees, but the morning chill is on a short lease. A brief patch of fog may appear around 7 a.m., then sunshine takes over as temperatures climb to 77 this afternoon.

Fog Gives Way To Full Sun

The fog should clear by about 8 a.m., with sunny skies through the afternoon and only light winds. According to the National Weather Service, no rain is expected, and Thursday night will stay clear with a low near 49 degrees.

Warm, Dry Weekend Ahead

Friday looks sunny and mild, with a high near 75 and a low around 48 Friday night. Saturday should be mostly sunny near 75, while Sunday should be mostly cloudy with highs in the upper 70s and light winds keeping outdoor plans comfortable.

The updated outlook extends the easy stretch covered in Wednesday’s forecast, keeping St. Louis warm and dry through the weekend. Monday remains mostly cloudy with highs in the upper 70s.

Cooler Air May Arrive Tuesday

Temperatures are expected to ease to around 73 Tuesday and 70 Wednesday, with mostly cloudy skies Tuesday night and mostly sunny conditions Wednesday.

No watches, warnings or advisories are in effect for the St. Louis area. For Thursday, a light jacket early should give way to sunglasses and short-sleeve weather by afternoon.