South Dakota – A gray, quiet sky hangs over Sioux Falls late this morning, but the calm won’t last. Pavement stays crisp in the low-20s air, and thin frost clings to windshields as residents ease into the new week. Any slick patches may linger through midday, especially on shaded bridges and rural roads west of the city.
According to the National Weather Service, conditions begin shifting Tuesday as south winds increase to 15 mph. That breeze pulls in milder air, helping Sioux Falls climb into the upper-30s by afternoon. Meteorologists now track a stronger push of energy arriving Wednesday, setting the stage for the most active stretch of the week. Gusts could reach 40 mph, especially north and west of the metro, and the atmosphere grows turbulent enough for light rain late Wednesday.
Plan for quickly changing travel conditions Wednesday evening. Wet pavement combined with falling temperatures may encourage early “flash-freeze” patches on untreated stretches of I-29 and I-90. While snow chances remain low, even a brief mix could blow around in the stiff winds, reducing visibility on open fields south of town.
Thursday brings a colder, blustery feel. Winds shift northwest, rising again toward 40–50 mph, and temperatures fall sharply into the 20s. A slight chance of light snow lingers early, though impacts appear limited. Still, residents preparing for early Christmas travel should watch for blowing snow in rural areas and colder wind chills.
By Friday and Saturday, sunshine returns with modest warming. Highs climb into the 30s, offering a short “December reset” before models hint at a broader winter pattern next week across the northern Plains.
Five-Day Outlook (Sioux Falls, SD)
• Today: Partly sunny, high 34.
• Tonight: Mostly cloudy, low 20.
• Tuesday: Partly sunny, high 39.
• Wednesday: Partly sunny, high 41; windy.
• Wednesday Night: Rain likely, low 21; blustery.
• Thursday: Slight snow chance, high 25; windy.
• Friday: Partly sunny, high 37.
