Very cold air is forecast to invade the state this weekend and make for a bitterly cold Sunday and Monday. The current NWS forecast has the high temperature failing to reach 10 degrees on both days. The featured chart presents the March daily frequency of having a sub 10 degree high temperature for Des Moines. The number labels above each bar are the number of years this situation has happened for that day of the month. The overall frequency makes this occurrence about once every 20 years with the last event happening in 2014.

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