St. Louis is starting the week on a chilly but bright note, with a clear and cool Tuesday morning and mid-morning temperatures in the upper 30s. Skies stay mostly sunny today with a high near 62°F, but the quiet spring vibe will not last long. The area heats up quickly Wednesday into the upper 70s, setting the stage for a much hotter Thursday ahead of an approaching cold front.
Thursday Heat Spike
According to the National Weather Service St. Louis, highs on Thursday could reach near 91°F, a level that would blow past typical late March temperatures and put daily March records in play. Southwest winds are expected around 9 to 13 mph with gusts up to about 23 mph, which should make the afternoon feel even hotter than the numbers on the thermometer suggest.
Storm Window Thursday Night
Showers and thunderstorms are forecast to fire along and behind the front after about 7 p.m. Thursday and roll on into early Friday. Some of those storms could bring heavier downpours and hail in the stronger cells. The front is expected to move east overnight, dragging in a much cooler air mass for Friday and knocking daytime highs back into the low 50s.
What To Know For Plans
If you have outdoor plans Thursday evening, it is a good idea to move them earlier or take them inside. Wet roads and gusty winds could slow late-night driving, and leftover storms may complicate the early Friday commute. To stay ahead of any changes, residents are encouraged to sign up for local emergency alerts through the city’s NotifySTL system for text or email warnings and official updates if conditions shift: NotifySTL.
Weekend Outlook
Friday will feel like someone flipped the seasonal switch, breezy and cooler with a high near 53°F and lows Friday night dipping into the low 30s. The weekend looks calmer, with a sunny Saturday in the mid 50s followed by a milder Sunday that rebounds into the mid 60s.
