Todays weather in St. Louis MO - Monday - 25 May 2026

St. Louis is waking up to one of the best Memorial Day forecasts in recent memory. Eighty-three degrees, mostly sunny skies, and a light easterly breeze of just one to seven miles per hour make today ideal for cookouts, parades, and anything outdoors. There is zero chance of rain, so get outside and enjoy it — but don't skip the sunscreen at those temperatures. Tonight, clouds move in and temperatures ease down to around 61°F, still comfortable but noticeably cooler.The shift begins Tuesday. Expect mostly cloudy skies with a high near 82°F and a 20% chance of afternoon storms after 2 p.m. Tuesday night is where the pattern gets serious — storms become likely overnight with a 55% precipitation chance and lows near 64°F. Wednesday commuters should plan ahead: a 55% chance of showers and thunderstorms carries into the daytime with a high near 84°F.The unsettled pattern holds through the rest of the week. Thursday, Friday, and Saturday all carry storm chances ranging from the low 30s to over 50%. It's not a washout, but it's not a dry stretch either. The first break appears Sunday, when rain chances drop to just 14% and skies trend mostly sunny again.Bottom line for St. Louis: today is the gift of the week. Dress light, wear sunscreen, and bring a layer for tonight. Then keep an eye on storm timing from Tuesday night onward — especially if you're commuting Wednesday morning.This episode includes AI-generated content.