ST. LOUIS — Precipitation is expected to move into the St. Louis metropolitan area after midnight early Saturday morning, Nov. 29, 2025, with snow likely between 3 a.m. and 6 a.m., according to Ben Herzog, meteorologist with the National Weather Service in St. Louis. Temperatures are forecast to be just below or at freezing as the sun rises on Saturday.
Herzog said with the present weather model, there is a 60 to 80 percent chance that snowfall will accumulate more than 2 inches in the Alton and surrounding Metro East area, and a 50 to 70 percent chance it will exceed 4 inches. However, the timing of a transition from snow to rain remains uncertain, particularly in the Alton area, where temperatures may rise enough to cause the snow to change over.
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“There is still a fair bit of uncertainty,” Herzog noted about the area weather forecast.
On Sunday, Nov. 30, 2025, rain is expected to taper off as clouds gradually clear, with temperatures dropping rapidly. Highs on Saturday will be in the 30s, falling to the mid to low 20s Saturday night, with lows around 20 degrees early Monday morning, Dec. 1, 2025. Monday’s high is forecast at 30 degrees, with temperatures near freezing on Tuesday and Wednesday.
Herzog cautioned motorists about the hazards of driving in light snowfall, which can be deceptively dangerous when drivers do not reduce speed adequately.
“It can be dangerous for people driving in smaller snowfall sometimes because people drive too confidently and don’t slow down enough,” he said. Herzog recommended that travelers consider altering their plans, suggesting that those who must travel on Saturday morning think about leaving on Friday or Sunday instead.
The National Weather Service will continue to monitor conditions and update forecasts as the situation develops.
