Missouri and western Illinois wake up to damp pavement and low gray clouds hugging the Gateway Arch skyline. Light rain lingers early, and temperatures hover near 45 degrees at Lambert Airport. Visibility drops in spots, especially along I-44 and I-64, where patchy fog may slow drivers through mid-morning.
Skies gradually brighten as the day unfolds. Highs reach 57 degrees with north winds around 10 mph. Roads improve quickly once rain ends, but allow extra space on bridges and shaded ramps where moisture can linger.
Tonight turns cooler with patchy fog developing again after late evening. Lows dip to 38 degrees. Presidents Day brings a noticeable warmup. Sunshine builds through the morning, and highs climb to 63 degrees under light southwest winds.
The warming trend accelerates Tuesday and Wednesday. Highs jump to 65 Tuesday, then surge to 71 by Wednesday with mostly sunny skies. These readings run well above average for mid-February and deliver early spring vibes across the metro.
According to the National Weather Service in St. Louis, no hazardous winter weather is expected through midweek. However, increasing warmth and periodic breezes could dry out soils. Fire danger may tick upward later in the week if winds increase.
Looking ahead, the 6–10 day outlook favors above-normal temperatures across much of the central United States. That pattern supports a mild Presidents Day week with rain chances returning late week rather than snow.
Five Day Outlook for St. Louis, Missouri:
Today: Gradual clearing, high 57.
Monday: Mostly sunny, high 63.
Tuesday: Mostly cloudy, high 65.
Wednesday: Mostly sunny, high 71.
Thursday: Sunny, high 72.
