A national study done by FiveThirtyEight.com has concluded that 3 of the top 8 cities in the United States with the most Unpredictable weather are located in South Dakota, with Sioux Falls coming in at No. 4.The study surveyed data from each of the 120 National Weather Service locations across the 50 states and compiled a database comparing 10 weather statistics and how unpredictable they are in each city. This study was on how unpredictable the weather is and NOT if the weather is good or bad (i.e. “In San Diego, to a first approximation, it’s always 72 degrees and sunny. In Seattle, to a first approximation, it’s always 59 degrees and drizzly. Most people like San Diego’s weather better, but both cities have fairly predictable weather patterns. “).