National Weather Service United States Department of Commerce

Fall Weather Pattern Arrives

Rain and much cooler temperatures behind a cold front will bring a feeling of fall to the east coast today. In addition, an active fall storm pattern developing in the Pacific Northwest this week will bring areas of heavy rains, and very high elevations could receive heavy snow. Wetting rains to the valley floors will spread south Thu and Fri into northern California,where active fires continue. Read More >

January 2015 had two distinct weather regimes.  After a couple of near normal days to start the month, Arctic air set up over the region.  The Arctic air was accompanied by snowfall on January 3 and 5 which brought most areas 3 to 8 inches of snow.  This cold air remained across the northern plains into mid January.  With fresh snow cover, several days had lows well below zero with highs struggling to warm above zero.  The weather dramatically changed around the 14th when mild air from the Pacific moved into the area.  This began over two weeks of well above normal temperatures with several days above freezing.  High temperatures at the end of the month averaged 10 to 15 degrees above normal. 

Below are graphics for Huron, SD, Marshall, MN, Mitchell, SD, Sioux City, IA, Sioux Falls, SD and Spencer, IA showing how far above and below normal temperatures were.  As can be seen, temperatures were rarely near normal in January.   The final graphic shows the average high temperature for January 1-13 and January 14-31.

Huron , South Dakota departure from normal for January 2015

Marshall, MN departure from normal for January 2015

Mitchell, South Dakota departure from normal for January 2015

Sioux Falls, SD departure from normal for January 2015

Sioux Falls, South Dakota departure from normal for January 2015

Spencer, Iowa Departure form normal for January 2015


Average January 2015 high temperatures