St. Louis starts Monday, October 19, with clear skies and a brisk upper-30s chill, but the afternoon will feel more like a mild spring encore: sunshine and a high around 72. Rain is not in the plan, and winds should stay barely noticeable.
Sunny Start, Gentle Afternoon
Temperatures will climb through the 40s in the morning, reach the 60s by early afternoon and peak near 70 to 72 before easing late in the day. The National Weather Service expects light southeast winds around 2 mph; a little fog remains possible in low-lying areas early, though confidence is low.
Warmth Builds Through Thursday
Monday night dips to about 47 degrees under partly cloudy skies, followed by another sunny Tuesday with a high near 74. Wednesday reaches 77 and Thursday 79, with mostly clear nights and no meaningful precipitation expected.
Weekend Looks Like Patio Weather
Friday stays sunny near 78, while Saturday and Sunday reach about 80 under mostly sunny skies. Winds increase modestly to 3 to 7 mph by Saturday, but the forecast remains dry, with only a 1% rain chance shown for the weekend.
No Weather Alerts In St. Louis
There are no watches, warnings or advisories for Missouri or Illinois in the forecast area. Hazardous weather is not expected through the week, so outdoor plans should have a mostly easy forecast—just bring a layer for the mornings.
