Updated January 7, 2014 with century record graphs.
The National Weather Service says the temperature reached 8 degrees below zero Monday, this cold snap marks first time Lambert Airport has recorded a negative air temperature since 1999.
Here's a visualization of daily minimum temperatures in St. Louis for the past 30 years. Scroll down over the calendar to see later years, and hover over an individual day to see the minimum temperature recorded that day at Lambert Airport.
Below that look at three decades of lows, find what days set the records for lowest lows.
It's been cold, but not all-time record cold