St. Louis

St. Louis Braces for Sizzling Week Ahead with Mid-90s Heatwave, Sunny Skies per NWS Forecast

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Published on September 12, 2025
St. Louis Braces for Sizzling Week Ahead with Mid-90s Heatwave, Sunny Skies per NWS ForecastSource: Google Street View

St. Louis, Missouri will experience sunny skies and high temperatures in the mid-90s for the coming week. Today will be sunny with a high near 95 degrees. Winds will be calm, becoming south around 5 mph in the morning, according to the National Weather Service.

Tonight will be mostly clear with a low around 71 degrees and a light southern breeze. On Saturday, the high is expected to reach near 98 degrees with sunny skies and light winds of 3 to 6 mph.

A 20 percent chance of showers enters the forecast Sunday afternoon, but otherwise conditions remain mostly sunny with highs in the mid-90s. Nights will stay muggy with lows in the low 70s.

Monday carries a 20 percent chance of showers after 1 p.m. under mostly sunny skies with highs again in the mid-90s.

By midweek, the pattern continues with sunny days, highs in the mid-90s, and some clouds at night.