St. Louis starts Friday, July 31, near 70 degrees with mostly clear skies, but the quiet opening is a brief one: showers may arrive before 10 a.m., followed by thunderstorms likely through midafternoon. Temperatures should climb to about 85 degrees, with a muggy, storm-ready setup replacing the recent stretch of lower humidity.
Storms Could Turn Severe Friday
The National Weather Service in St. Louis expects another round of storms Friday afternoon and evening as a cold front moves through. Damaging wind gusts are the main concern, while a few storms could also produce very heavy rain and isolated tornadoes.
Rain chances peak from late morning into early afternoon, then ease briefly before storms continue or redevelop Friday evening. South winds of 6 to 12 mph could gust to 21 mph during the day, and some localized spots may receive 3 or more inches of rain if storms move over the same area.
Cooler Weekend Brings More Showers
A cold front will knock Saturday, August 1, down to around 78 degrees, but the unsettled pattern is not finished: showers and thunderstorms are likely Saturday, including another chance Saturday night as temperatures dip to about 68. Sunday looks partly sunny with a high near 81 and a 30% chance of showers.
After that, the forecast turns progressively warmer and drier. Monday should reach 84 degrees with only a slight shower chance, followed by 87 Tuesday, 90 Wednesday and 92 Thursday; no watches or warnings are listed for Missouri or Illinois in the current forecast.
What To Know Before Heading Out
Outdoor plans Friday should include a way to get indoors quickly, especially during the afternoon and evening when storms may bring strong winds and lightning. Commuters should also watch for sudden downpours and slick roads, while anyone spending time outside Saturday should keep rain gear handy despite the cooler temperatures.
