St. Louis starts Monday with scattered to broken upper-level clouds that should clear by midmorning, near 59 degrees, but the afternoon will feel more like midsummer than mid-October. Sunshine will push temperatures to 94, with southwest winds at 10 to 15 mph and virtually no rain expected.
The heat peaks Tuesday, when St. Louis could reach 96 degrees and heat-index values may climb as high as 102. The National Weather Service says both days could challenge daily temperature records, making the early-week forecast unusually hot even by the region's recent standards.
Storms Arrive Tuesday Night
Conditions turn unsettled after 1 a.m. Tuesday night, when showers and thunderstorms have a 40% chance. Forecasters say the storm threat is generally low but could include isolated marginally severe hail, damaging wind gusts and locally heavy rain.
Wednesday brings the main soaking, with showers and thunderstorms likely through the day and a high near 83. More storms are expected Wednesday night, followed by another rainy Thursday with an 80% chance of showers and thunderstorms.
Cooler Air Takes Over By Friday
The sharp change from heat to rain is a meaningful update to the warm-and-stormy pattern covered in Sunday's Hoodline forecast. The latest outlook now points to widespread rainfall through Thursday before a cold front sweeps in and knocks Friday's high down to about 64 degrees.
Friday will also turn breezy, with northwest winds around 18 mph and a low near 42. Saturday looks sunny but chilly, topping out near 62 with a low around 40, while Sunday rebounds to a milder 70 under sunny skies.
What To Know For Outdoor Plans
Monday and Tuesday will be the best days for dry outdoor plans, but the heat will be serious for October, especially Tuesday afternoon. No watches, warnings or advisories are listed in the current forecast, though people spending time outside should plan for breaks, water and a quick check of the forecast before storms move in.
