As of 5:35 a.m. CDT on Saturday, March 14, 2026, St. Louis skies are clear and temperatures are sitting near 39°F. A mostly sunny afternoon is on tap with a quick warm-up into the mid-60s and east winds around 5–13 mph, gusting to about 22 mph. If you have outdoor plans, this is the day to take them. Enjoy the mild stretch while you can, because the real mood swing shows up on Sunday.
Afternoon Winds Pick Up
The big story is the Sunday wind shift. Southerly winds will strengthen, with sustained speeds of 17–21 mph and gusts up to 38 mph, and forecasters note a high chance for even stronger post-frontal gusts north of Interstate 70 late Sunday night and early Monday. There is a low chance that a few storms could produce damaging wind gusts, along with a secondary tornado risk across far southeastern Missouri and southern Illinois. Secure loose outdoor items and be ready for blustery conditions during the Sunday commute, especially on bridges and other exposed roadways, according to the National Weather Service.
Rain Then A Quick Changeover To Snow
Rain is likely on Sunday, starting as scattered showers in the morning and becoming steadier by the afternoon. A few thunderstorms are possible around midday with highs near 68°F before temperatures start to fall. After 10 p.m. Sunday, a sharp cold front will sweep through and precipitation should flip to a mix of rain and snow, with lows dropping to near 22°F. New snow accumulation of less than one inch is possible, mainly on grassy and elevated surfaces north of I-70. Even light accumulations combined with brisk northwest winds could lead to brief slick spots and some blowing snow Monday morning.
What To Expect For Commutes And Events
Plan on travel becoming more difficult Sunday night into Monday morning where the rain-to-snow changeover occurs, with the worst of the wind and brief slick conditions most likely north of I-70. Metro Transit posts service alerts and recommends checking updates before you travel. If you are driving, allow extra time, slow down for wet roads, and tie down patio furniture and other loose items. Keep an eye on local official updates and sign up for city alerts if you have not already.
Bottom line: enjoy a mild, sunny Saturday, then brace for a gusty, wetter Sunday that turns briefly wintry overnight into Monday. Even small snow accumulations paired with strong post-frontal gusts could make the Monday morning commute a bit tricky.
