SIOUX FALLS, S.D. – The wind howls through the plains this morning, sweeping leaves down quiet streets as a sharp chill grips the region. A blustery start to the day will give way to calm, cold nights — and by midweek, Sioux Falls and much of southeast South Dakota could see their first frost of the season.
According to the National Weather Service in Sioux Falls, a Wind Advisory remains in effect through early afternoon Tuesday, with northwest gusts up to 45 mph expected. Loose debris and unsecured items could be blown around, and minor power interruptions remain possible. Fire danger will stay elevated as the dry air lingers into the evening.
Once the winds subside, attention shifts to the cold. Clear skies and calm air will allow temperatures to tumble into the lower 30s by late Tuesday night and again Wednesday night. That’s enough for patchy frost — and possibly a light freeze — across low-lying and rural areas. Gardeners should cover sensitive plants and bring outdoor pots inside. Those with sprinkler systems are advised to drain and store equipment before temperatures dip further later this week.
After a brisk Wednesday, highs rebound slightly into the upper 50s and low 60s by Thursday and Friday. The weekend looks calmer and seasonably cool, with sunny afternoons and crisp mornings ideal for fall cleanup or Halloween decorating. Still, models hint that another, stronger cold front may arrive early next week — possibly delivering the first widespread freeze across eastern South Dakota before the month ends.
Five-Day Forecast for Sioux Falls, SD:
Tue: 52/30 – Clearing; very windy early, calmer late.
Wed: 58/30 – Sunny; frost likely by dawn.
Thu: 58/36 – Mostly sunny; cool, crisp morning.
Fri: 62/42 – Mostly sunny; patchy frost early.
Sat: 64/43 – Partly cloudy; pleasant fall afternoon.
