Des Moines, Iowa – A surge of early-season heat will push temperatures across Iowa into the low 80s by Saturday afternoon, while a 40 to 50 percent increase in rain chances brings a more active storm pattern across the state.
According to the National Weather Service Climate Prediction Center, there is a 70 to 85 percent probability of above-normal temperatures statewide through early next week, paired with an above-normal precipitation signal across the Midwest. This puts Iowa in a zone where heat and storm development will overlap.
Des Moines is expected to reach the low 80s between 2 p.m. and 6 p.m. Saturday, with similar warmth extending along the I-35 and I-80 corridors into Ames, Ankeny, and Iowa City. Cedar Rapids and eastern Iowa will also climb into the upper 70s to near 80, with increasing humidity through the afternoon.
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-80 and I-380, which could impact travel.
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.
