SIOUX FALLS, S.D. – A quiet but foggy start greets the Sioux Empire this morning, with visibility dropping to a few hundred feet in low-lying areas. The damp chill and calm air set the stage for another subtle transition weekend — one where fog gives way to sunshine before rain chances return late Sunday.
According to the National Weather Service in Sioux Falls, patchy dense fog will persist through midmorning Friday, particularly west of the James River Valley and near river basins. Drivers should use caution as visibility can fall below a mile at times, and light frost may form on untreated roads or bridges as temperatures hover near freezing. Conditions improve by late morning, leaving behind a mostly sunny, mild day with highs near 48°F.
Saturday looks calm and pleasant — sunny with highs in the mid-50s — a perfect window for outdoor errands or early Thanksgiving travel. However, another weather shift arrives late Sunday night as a weak frontal boundary brings a 60% chance of rain, especially across southeast South Dakota and parts of northwest Iowa. While no snow is expected yet, colder air will trail this system, ushering in overnight lows near the upper 20s by midweek.
Looking ahead, Thanksgiving Day appears mostly sunny but cold, with highs near 30°F and a brisk north breeze. Beyond the Plains, long-range models hint at a larger-scale winter pattern from Nov. 25–Dec. 3, with the potential for 3–10 inches of snow across portions of the northern U.S.
For now, Sioux Falls residents can expect a weekend of shifting skies — fog, sun, and finally, the first hints of a colder, wintry stretch just in time for the holiday travel rush.
Five-Day Forecast for Sioux Falls, SD:
Fri: 48/34 – Fog early, then mostly sunny.
Sat: 55/31 – Sunny and calm.
Sun: 56/39 – Increasing clouds, rain late.
Mon: 52/35 – Rain likely, turning cooler.
Tue: 42/23 – Mostly dry, colder trend.
