Missouri greets the first Monday of 2026 with crisp air, bright sun, and a calm start that feels more like early spring than mid-winter. Sidewalks dry quickly, and coats feel optional as temperatures rise fast after sunrise across the St. Louis region.
According to the National Weather Service, highs climb into the upper 50s today with light south winds. That warmth continues Tuesday and Wednesday, pushing readings into the low 60s. For early January, the stretch runs well above average and keeps road conditions quiet for now.
The calm does not last. Clouds increase late Wednesday as moisture returns to the region. A slight rain chance develops Wednesday night, signaling the next change in the pattern. By Thursday, rain becomes likely, especially during the afternoon and evening hours.
Wet pavement and reduced visibility could affect travel along I-64, I-70, and I-55. Drivers should plan extra time and watch for slick on-ramps and shaded stretches. To be fair, temperatures stay mild, but winter rules still apply when roads turn wet and traffic increases.
Rain chances linger into Thursday night and early Friday. A few rumbles of thunder are possible Friday as another system passes through. While no snow or ice is expected this week, the active pattern matters as colder air waits in the wings later this month.
Looking ahead toward the weekend, temperatures trend cooler, and sunshine gradually returns. Winter is far from finished, even with this brief January warm spell. Daylight continues to increase, adding noticeable evening light as the month progresses.
Traveling later this week? Let us know how road conditions look where you are.
Five-Day Weather Outlook for St. Louis, Missouri
Monday: Sunny and mild. High near 58.
Tuesday: Mostly sunny and warmer. High near 61.
Wednesday: Mostly sunny, clouds late. High near 61.
Thursday: Rain likely, roads wet. High near 61.
Friday: Chance of rain and storms. High near 62.
