St. Louis gets one more hot Sunday before thunderstorms begin knocking the heat down. Temperatures will climb Sunday, with the bigger change arriving after sunset, when rain and storms become increasingly likely across the city.
According to the National Weather Service, Sunday afternoon will stay mostly dry, with west winds around 3 to 7 mph and only a small chance of rain. The forecast lists no active watches or warnings for Missouri or Illinois, but outdoor plans should account for a wetter night.
Storms and Showers Move In
Rain becomes likely Sunday night and continues into Monday morning, with a conditional storm threat Sunday afternoon and evening followed by overnight showers.
Monday will be cooler, with showers and thunderstorms possibly continuing into the morning. The shift follows the hot stretch covered in an earlier Hoodline forecast, but the latest outlook now puts the storm timeline and cooldown in sharper focus.
Cooler Air Takes Over Tuesday
Temperatures settle into the low to mid-70s Tuesday, with overnight lows in the 50s. Wednesday and Thursday then look comfortable and mostly sunny, with temperatures gradually warming through the 70s toward the low 80s by the following weekend.
For Sunday, the practical play is simple: handle heat-sensitive outdoor activities earlier in the day, keep water nearby, and check the sky before heading out after dark. The rain chances ease substantially after Monday, giving St. Louis a cooler and quieter run through the middle of the week.
