St. Louis/ Weather & Environment

From Sprinkles to Sizzle: St. Louis Braces for Warm, Stormy Week

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Published on September 27, 2026
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Light rain is greeting St. Louis early Sunday, but the damp start should fade before the city settles into a mostly cloudy afternoon. Sunday, September 27, will top out near 73 degrees, with only a 40% chance of showers before 10 a.m. and light northeast winds around 2 mph.

After the morning sprinkles move out, skies should stay gray for much of the day, with a small chance of another passing shower. The National Weather Service has no active watches, warnings or advisories posted for the St. Louis area.

Cool Sunday Night Gives Way To Sunshine

Sunday night will remain mostly cloudy, with temperatures dipping to around 57 degrees and northeast winds near 3 mph. Monday looks considerably brighter, with sunny skies and a high near 77.

The warm-up continues Tuesday, when mostly sunny skies and a high near 82 are expected. Wednesday could reach about 85 degrees, although clouds will increase ahead of the next weather system.

Rain Chances Rise Late In The Week

Showers could return Wednesday night, with a 40% chance of rain after 7 p.m. Thursday brings a 60% chance of rain showers and a high near 81, followed by another round of likely showers and thunderstorms Thursday night.

Showers and thunderstorms are also likely Friday, with a cooler high near 76 and a 60% chance of precipitation. Saturday should ease back to the low 70s, but a 40% chance of rain showers remains in the forecast for outdoor plans.