Friday is expected to turn sunny, but afternoon temperatures are expected to surge near 90. Patchy fog may linger before 8 a.m., then sunshine takes over for a summer-like finish to the workweek. No watches or warnings are in effect for the forecast area.
Friday Brings Near-Record Heat
Friday’s high is forecast near 90 under sunny skies, with south winds around 5 to 9 mph and virtually no rain chance. That would edge past St. Louis’ October 9 record high of 89 set in 1938, according to the National Weather Service.
Weekend Turns Cloudier, But St. Louis Stays Mostly Dry
Saturday cools to about 81 and turns mostly cloudy, with a small rain risk in the wider region. The latest forecast keeps the best chance of light rain mainly in southeast Missouri and southwest Illinois, while the St. Louis metro has only a slim chance; the update adds more detail to an earlier Hoodline forecast.
Heat Rebounds Monday
Sunday brings sunshine and a high near 83 before another jump Monday, when St. Louis could reach near 90 under mostly sunny skies. Monday’s forecast is also in near-record territory, with the current record at 90, set in 2024.
Rain Chances Increase Thursday
Tuesday’s temperature forecast remains highly uncertain, with a wide range of possible temperatures. Precipitation chances are likely to lull Tuesday and Wednesday, then increase Thursday onward.
