St. Louis, MO – A Freeze Warning is in place across the St. Louis metro area through 9 a.m. Tuesday, with spring frost posing a threat to crops, plants, and plumbing along major roadways including I-55, I-64, and I-70.
According to the National Weather Service in St. Louis, sub-freezing temperatures are expected overnight Monday into early Tuesday, with lows as cold as 23°F. This warning affects eastern Missouri and west central Illinois, including St. Louis County, St. Charles County, and nearby Illinois counties such as Madison, Monroe, and Jersey.
Residents are urged to cover outdoor plants and protect sensitive vegetation and exposed plumbing. Frost and freeze conditions could cause significant damage to spring crops if not properly managed. Light winds and clear skies will accelerate cooling after midnight, increasing the frost potential for low-lying and rural areas.
By Tuesday, temperatures will rebound into the mid-50s with sunshine returning by afternoon. However, colder-than-usual overnight lows persist through midweek.
Here’s your 5-day spring weather outlook for St. Louis:
- Tuesday Night: Low near 41°F, light wind, partly cloudy.
- Wednesday: High near 67°F, chance of showers (40%).
- Wednesday Night: Slight chance of thunderstorms, low around 47°F.
- Thursday: 50% chance of rain, high of 66°F.
- Friday: Sunny, high near 59°F.
- Saturday-Sunday: Mostly sunny, highs in the mid-60s to low 70s.
