Bismarck, ND – The Dakotas are entering one of the coldest and most wintry setups in the nation from December 18–24, with NOAA’s 8–14 Day Outlook showing below-normal temperatures across nearly all of North Dakota and northern South Dakota, paired with above-normal precipitation across much of the region. This combination strongly favors snowstorms, dangerous wind chills, and difficult travel leading into Christmas Eve.
According to NOAA, North Dakota—including Bismarck, Fargo, Minot, Grand Forks, and Williston—sits squarely in the core of the below-normal temperature zone, with Arctic air lingering behind this week’s blast. Temperatures will stay well below freezing, ensuring all precipitation falls as snow. Multiple systems between December 19–23 may produce accumulating snow, with blowing and drifting likely along I-94 and U.S. 2.
Wind chills in northern North Dakota may drop into the -10 to -25 range, adding to travel hazards.
In South Dakota, northern and central regions—including Aberdeen, Watertown, Huron, and Pierre—also fall in the coldest temperature anomalies. This area can expect steady snow, with periods of heavier banding possible. Travel on Highway 14 and I-29 may become difficult at times.
Farther south—including Sioux Falls, Mitchell, Brookings, and Yankton—temperatures trend slightly warmer early in the week. This may allow for brief periods of freezing drizzle or sleet between December 19–21. However, colder air returns statewide by December 22–24, shifting precipitation back to all snow as Christmas Eve approaches.
Across both states, major corridors—including I-94, I-29, I-90, and U.S. 83—may experience snow-covered roads, reduced visibility, drifting snow, and slowdowns, especially December 21–24.
