St. Louis, MO Weather
Today's Forecast
Mostly clear, with a low around 66. North wind around 3 mph.
7-Day Outlook
Create Your Own Forecast
Draw custom regions on a map, add daily breakdowns with timing and prediction data, and share professional forecasts with your audience.
Data from the National Weather Service
Last updated Sun, Aug 23, 4:16 AM UTC
Winter in St. Louis
St. Louis averages 14 inches of snow a year, according to NOAA’s 1991–2020 climate normals — a occasional snow place. Snow is a few-times-a-year event. Limited equipment means modest amounts cause real disruption.
That is why local snowfall thresholds differ so much from one town to the next: a district that plans for 14 inches a year is equipped differently from one that never sees any. Here, roughly 2 inches in a single storm is where a normal school day comes under threat.
Upper air over St. Louis
The nearest radiosonde launch is Lincoln, about 115 miles away. A weather balloon goes up twice a day and measures temperature, humidity and wind all the way through the atmosphere — which is what forecasters actually read to judge whether storms will fire, and how a surface forecast was arrived at.