St. Louis, MO – A quiet and sunny start to the workweek across the St. Louis metro will give way to increasing rain chances and a noticeable cooldown beginning Tuesday and intensifying through the end of the week.
According to the US National Weather Service in St. Louis, dry conditions will hold through Monday with highs reaching the low to mid-80s across St. Louis County, St. Charles County, and surrounding parts of eastern Missouri and southwest Illinois. Conditions begin to shift Tuesday, especially north of Interstate 70, where rain chances rise to 30–70% by the afternoon and evening hours.
By Wednesday, a broader system moves into the region, bringing widespread rain chances between 60–90% and significantly cooler temperatures. Highs are expected to drop into the 50–80 degree range, depending on rainfall coverage and timing.
The most impactful day appears to be Thursday, when rain chances peak at 80–90% across much of the region, including the greater St. Louis metro area. Daytime highs will struggle to climb beyond the mid-50s to mid-70s, marking a sharp contrast from the early-week warmth.
Rain chances continue into Friday, though coverage becomes more scattered, with 30–50% chances and highs rebounding slightly into the mid-60s to mid-70s.
Drivers along major corridors including I-70, I-64, and I-44 should prepare for wet roads and potential slowdowns during peak rain periods midweek.
Residents are encouraged to monitor updated forecasts as timing and rainfall totals become clearer.
This article was produced by a journalist and may include AI-assisted input. All content is reviewed for accuracy and fairness.
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