St. Louis

St. Louis Wakes Up Chilly, Braces for 90-Degree Whiplash by Weekend

AI Assisted Icon
Published on May 10, 2026
St. Louis Wakes Up Chilly, Braces for 90-Degree Whiplash by WeekendSource: Google Street View

St. Louis is starting Sunday, May 10 on a cool and calm note, with clear skies, light north winds, and temperatures hanging in the upper 50s to low 60s. Skies stay mostly sunny through the day, and the afternoon high should land near 71°F, a sweet spot for getting outside or knocking out errands. Tonight, the area dips back into the upper 40s.

Afternoon Outlook

By mid to late afternoon, highs will top out around 71°F with a light north breeze near 7 mph and only a very small chance of any stray shower. All signs point to a pleasant day, though you may want a light layer handy once the sun starts to slide down.

Week Ahead And Storm Timing

The thermometer starts climbing as the new week kicks in. Monday, May 11 stays on the sunny side with highs near 77°F. By Tuesday, May 12, readings jump into the low-to-mid 80s, helped along by southwest winds with gusts up to about 22 mph.

A cold front moves through Tuesday night with a 40% chance of showers and thunderstorms, mainly between 7 p.m. and 1 a.m., which could put a dent in evening plans. Late in the week, highs rise further into the upper 80s and could reach around 92°F by Saturday, with only spotty storm chances, according to the National Weather Service St. Louis.

Planning And Travel Tips

Today and Monday are the lowest-risk days for outdoor events. If you are planning something for late Tuesday, consider shifting it earlier in the day or lining up a backup indoor option. Before Tuesday’s gustier winds arrive, secure lightweight outdoor items that might blow around. Looking toward Friday and Saturday, factor in heat and shade needs if you will be working or playing outside, and check back for forecast updates if you have evening or weekend plans.

Earlier Coverage

We recently looked at the soggy stretch last Tuesday and how it made a mess of commutes across the metro in our coverage of raw rain soaking St. Louis.