SIOUX CITY, Iowa (KCAU)- Tonight will be cool at 31 with light SE winds. Tomorrow will be mostly cloudy with a high of 49 and light winds from the south. 52 and cloudy on Monday. 55 and cloudy on Tuesday with a 30% chance of rain. Wednesday will be around 53 with a 40% chance of rain. Cooler on Thursday at 45 with a 30% chance of a wintry mix. 50 and partly cloudy on Friday.