St. Louis, Missouri – A surge of early-season heat will push temperatures across Missouri into the upper 80s by Saturday afternoon, while a 40 to 50 percent increase in rain chances brings a more active and unsettled pattern.
According to the National Weather Service Climate Prediction Center, there is an 80 to 90 percent probability of above-normal temperatures statewide through early next week, paired with an above-normal precipitation signal across the Mid-Mississippi Valley. This places Missouri in a corridor where heat and storm development will overlap.
St. Louis is expected to reach the upper 80s between 2 p.m. and 6 p.m. Saturday, with similar warmth extending west along I-70 into Columbia and Kansas City. Springfield and southern Missouri will also climb into the mid to upper 80s, with increasing humidity fueling instability.
By late afternoon into the evening, scattered to numerous showers and thunderstorms are expected to develop statewide. Storms may produce brief heavy rain, lightning, and wind gusts over 40 mph, especially along I-44, I-55, and I-70, potentially impacting travel and outdoor plans.
Residents should stay hydrated during peak heat while remaining alert for rapidly changing weather later in the day. This pattern of heat combined with increased storm activity will persist through early next week, with additional advisories likely.
