Todays weather in St. Louis MO - Saturday - 13 June 2026

Saturday in St. Louis brings heat, humidity, and a real chance of storms from afternoon through the early morning hours. Current conditions sit at 87°F with thunderstorms possible at practically any point during the day. A light south wind of 5–8 mph isn't doing any favours — the air feels heavy the moment you step outside, and the heat isn't going anywhere.The afternoon forecast calls for persistent cloud cover, a high near 87°F, and scattered showers or thunderstorms that can fire up without much warning. Keep outdoor plans flexible and watch the sky closely. Tonight is where the bigger concern lies: storm chances jump to 66%, with the window between 11 PM and 3 AM carrying the highest risk of heavy rainfall. Lows fall to around 67°F. If you're heading out late, bring a rain layer and close the car windows before you go.The good news? Sunday is a genuine reset. A slight storm chance clears by 7 AM, then mostly sunny skies take over with a high near 77°F and a refreshing northwest wind gusting to 21 mph. Sunday night is partly cloudy and dry, dropping to 59°F. Monday looks even better — mostly sunny, high near 79°F, virtually no wind, and no rain in sight. A classic June day.Tuesday warms to 83°F before storms return late, and the mid-week period carries more rain chances. No severe weather alerts are currently in effect for the St. Louis metro area.Bottom line: carry an umbrella today, stay alert tonight, and save the big outdoor plans for Monday.This episode includes AI-generated content.