St. Louis/ Weather & Environment

St. Louis Cools Off Wednesday With Warm-Up Possible Next Week

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Published on September 23, 2026
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St. Louis is getting a brief taste of fall Wednesday, with low clouds moving over the area and a high near 73 degrees. The day should offer a break from late-September heat.

The National Weather Service St. Louis discussion describes low clouds moving over the area.

Thursday Brings a Possible Warm-Up

Thursday could be about 5 to 10 degrees warmer than Wednesday, though cloud cover and temperatures remain uncertain. Friday looks similarly mild and mostly sunny to partly sunny.

Weekend Rain Chances Return

Rain chances return over the weekend, though temperatures from Saturday through Tuesday remain uncertain.

A warm-up is possible early next week, though temperatures remain uncertain. Tuesday's 75th-percentile high is in the upper 80s to low 90s. A possible midweek cold front brings the forecast period's greatest chance of widespread rain.