Columbine seemed to kick off a spate of school shootings in the country in the years since, the deadliest taking place in 2007 when a gunman opened fire on the campus of Virginia Tech University in Blacksburg, Va., killing 32. Sue Klebold recalled the horror of that morning in her interview with Sawyer.
Average Weather in Waterloo Iowa, United States. Waterloo has a humid continental climate with hot summers and no dry season. The temperature typically varies from 12Â°F to 84Â°F over the course of the year, and is rarely below -9Â°F or above 92Â°F. The warm season lasts for 128 days, from May 17 to September 22, with an average daily high temperature above 72Â°F.
Although severe temperature drops occur, the state isn't always frigid -- the average temperature ranges from 7.2 degrees Celsius (45 Fahrenheit) in the extreme north to 11.1 degrees Celsius (52 Fahrenheit) in the southeastern corner. Temperatures can also reach 30.6 degrees Celsius (87 Fahrenheit) in the southwest. Northwesterly winds from Canada make winters dry and cold with January being the coldest month. Iowa is also relatively flat with elevation changing minimally -- it only varies from 480 feet to 1,679 feet. The lowest recorded temperatures throughout the month of January in Des Moines tend to fall below -17.8 degrees Celsius (0 Fahrenheit), according to Weather Warehouse.