St. Louis

St. Louis Braces for Sweltering Heat Wave with Temperatures Approaching 100°F

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Published on August 08, 2025
St. Louis Braces for Sweltering Heat Wave with Temperatures Approaching 100°FSource: Google Street View

The National Weather Service in St. Louis is forecasting high temperatures and humidity that will sear the city in the coming days, with today's sunny skies leading to a high near 96°F and heat index values peaking at a scorching 103°F. The light breezes in the morning will become south winds ranging from 6 to 11 mph, hardly providing any relief from the heat. In a report provided by the NWS, the current conditions in St. Louis disclose a few clouds in the sky with a relative humidity at 79%, making the real-feel temperatures even more oppressive.

Tonight, the heat gives no respite as the low is expected to hover around 76°F, with a consistent southeast wind at 8 to 11 mph the weekend outlook doesn't seem much cooler, with Saturday and Sunday promising more of the same blisteringly high temperatures just shy of the century mark, and heat index values remaining above the 100-degree threshold. The winds, though gusting to as high as 20 mph, likely won't provide much in terms of cooling, instead just shuffling around the hot air.

Heading into the start of the next work week, St. Louis residents can anticipate a slight shift in the weather pattern, with a 30 percent chance of showers and thunderstorms emerging after 1 pm on Monday, offering a potential, albeit slight, reprieve from the heat. The high will still be near 93°F before nightfall brings a 40 percent chance of showers and thunderstorms, according to the detailed forecast from the NWS.

The remainder of the week's forecast suggests that these storm chances will linger, hovering around the 20 to 30 percent mark, but so too will the high temperatures with the thermostat flirting with the low 90s through Thursday. While evenings will offer little in terms of a cool-down, as lows are expected to settle in the mid-70s, as night after night partly cloudy skies will offer only a thin veil against the day's residual warmth.