Record low temperature of 15°F on February 10, 2011 - first record low temperature since December 4, 2006
100 hours below freezing - longest streak since January 1997 (107 hours)
High temperature of 20°F on February 2 - lowest high temperature since December 22, 1990 (16°F)
5 consecutive mornings in the teens - first time since December 1989
Several snow/sleet events over that period. I remember it snowing fairly hard at 17 degrees at our place, and thinking "this is why we love winter."

...sigh...