Sioux Falls, SD Weather Alert Today: Warm Start Before Monday’s Rain–Snow Chance

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South Dakota – A calm, cool dawn stretches across Sioux Falls as thin clouds drift above the glowing eastern horizon and light breezes ruffle the dry grass along I-29 and Route 42. The morning feels deceptively gentle for mid-November, a reminder that the season’s true cold is waiting just beyond the ridge. Residents should enjoy the warmth now and prepare for a quick shift as early winter signs creep closer.

According to the National Weather Service in Sioux Falls, today brings sunshine with highs near the mid-70s, supported by steady southwest winds. Gusts may spike near 20 mph by midday, which elevates fire danger across exposed fields in southeast South Dakota. Anyone burning debris or using outdoor equipment should stay cautious.

Saturday stays mostly sunny, though temperatures drop into the upper 50s as a cooler north wind nudges in. To be fair, the day still feels comfortable for late-fall chores or early Thanksgiving travel prep. But forecasters highlight a “Winter Tease” building upstream as colder Canadian air presses toward the Dakotas.

Sunday keeps the pattern quiet with highs in the lower 50s. According to NWS meteorologists, the key change arrives Monday, when a fast-moving disturbance brings a 30 percent chance of rain and snow. A possible changeover could form after sunset, especially north and west of Sioux Falls. Light accumulation remains uncertain, but even a slushy mix may slow traffic along I-29 and I-90. Models hint at a sharper cold snap later next week, which often signals the first meaningful winter push before Thanksgiving.


Five-Day Forecast for Sioux Falls, SD:
Fri: 74/45 – Sunny; breezy southwest winds and elevated fire danger.
Sat: 57/33 – Mostly sunny; cooler north wind.
Sun: 53/34 – Mostly sunny; calm and seasonable.
Mon: 44/27 – Mostly cloudy; rain–snow chance late day.
Tue: 42/30 – Partly sunny; colder breeze and early winter feel.